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/* http://keith-wood.name/datepick.html
   Date picker for jQuery v5.0.0.
   Written by Keith Wood (kbwood{at}iinet.com.au) February 2010.
   Licensed under the MIT (https://github.com/jquery/jquery/blob/master/MIT-LICENSE.txt) licence. 
   Please attribute the author if you use it. */

(function($) { // Hide scope, no $ conflict

        var pluginName = 'datepick';


        /** Create the datepicker plugin.
                <p>Sets an input field to popup a calendar for date entry,
                        or a <code>div</code> or <code>span</code> to show an inline calendar.</p>
                <p>Expects HTML like:</p>
                <pre>&lt;input type="text"> or &lt;div>&lt;/div></pre>
                <p>Provide inline configuration like:</p>
                <pre>&lt;input type="text" data-datepick="name: 'value'"/></pre>
                @module Datepick
                @augments JQPlugin
                @example $(selector).datepick()
 $(selector).datepick({minDate: 0, maxDate: '+1m +1w'}) */
        $.JQPlugin.createPlugin({
        
                /** The name of the plugin. */
                name: pluginName,
                
                /** Default template for generating a datepicker.
                        Insert anywhere: '{l10n:name}' to insert localised value for name,
                        '{link:name}' to insert a link trigger for command name,
                        '{button:name}' to insert a button trigger for command name,
                        '{popup:start}...{popup:end}' to mark a section for inclusion in a popup datepicker only,
                        '{inline:start}...{inline:end}' to mark a section for inclusion in an inline datepicker only.
                        @property picker {string} Overall structure: '{months}' to insert calendar months.
                        @property monthRow {string} One row of months: '{months}' to insert calendar months.
                        @property month {string} A single month: '{monthHeader<em>:dateFormat</em>}' to insert the month header -
                                                <em>dateFormat</em> is optional and defaults to 'MM yyyy',
                                                '{weekHeader}' to insert a week header, '{weeks}' to insert the month's weeks.
                        @property weekHeader {string} A week header: '{days}' to insert individual day names.
                        @property dayHeader {string} Individual day header: '{day}' to insert day name.
                        @property week {string} One week of the month: '{days}' to insert the week's days,
                                                '{weekOfYear}' to insert week of year.
                        @property day {string} An individual day: '{day}' to insert day value.
                        @property monthSelector {string} jQuery selector, relative to picker, for a single month.
                        @property daySelector {string} jQuery selector, relative to picker, for individual days.
                        @property rtlClass {string} Class for right-to-left (RTL) languages.
                        @property multiClass {string} Class for multi-month datepickers.
                        @property defaultClass {string} Class for selectable dates.
                        @property selectedClass {string} Class for currently selected dates.
                        @property highlightedClass {string} Class for highlighted dates.
                        @property todayClass {string} Class for today.
                        @property otherMonthClass {string} Class for days from other months.
                        @property weekendClass {string} Class for days on weekends.
                        @property commandClass {string} Class prefix for commands.
                        @property commandButtonClass {string} Extra class(es) for commands that are buttons.
                        @property commandLinkClass {string} Extra class(es) for commands that are links.
                        @property disabledClass {string} Class for disabled commands. */
                defaultRenderer: {
                        picker: '<div class="datepick">' +
                        '<div class="datepick-nav">{link:prev}{link:today}{link:next}</div>{months}' +
                        '{popup:start}<div class="datepick-ctrl">{link:clear}{link:close}</div>{popup:end}' +
                        '<div class="datepick-clear-fix"></div></div>',
                        monthRow: '<div class="datepick-month-row">{months}</div>',
                        month: '<div class="datepick-month"><div class="datepick-month-header">{monthHeader}</div>' +
                        '<table><thead>{weekHeader}</thead><tbody>{weeks}</tbody></table></div>',
                        weekHeader: '<tr>{days}</tr>',
                        dayHeader: '<th>{day}</th>',
                        week: '<tr>{days}</tr>',
                        day: '<td>{day}</td>',
                        monthSelector: '.datepick-month',
                        daySelector: 'td',
                        rtlClass: 'datepick-rtl',
                        multiClass: 'datepick-multi',
                        defaultClass: '',
                        selectedClass: 'datepick-selected',
                        highlightedClass: 'datepick-highlight',
                        todayClass: 'datepick-today',
                        otherMonthClass: 'datepick-other-month',
                        weekendClass: 'datepick-weekend',
                        commandClass: 'datepick-cmd',
                        commandButtonClass: '',
                        commandLinkClass: '',
                        disabledClass: 'datepick-disabled'
                },
        
                /** Command actions that may be added to a layout by name.
                        <ul>
                        <li>prev - Show the previous month (based on <code>monthsToStep</code> option) - <em>PageUp</em></li>
                        <li>prevJump - Show the previous year (based on <code>monthsToJump</code> option) - <em>Ctrl+PageUp</em></li>
                        <li>next - Show the next month (based on <code>monthsToStep</code> option) - <em>PageDown</em></li>
                        <li>nextJump - Show the next year (based on <code>monthsToJump</code> option) - <em>Ctrl+PageDown</em></li>
                        <li>current - Show the currently selected month or today's if none selected - <em>Ctrl+Home</em></li>
                        <li>today - Show today's month - <em>Ctrl+Home</em></li>
                        <li>clear - Erase the date and close the datepicker popup - <em>Ctrl+End</em></li>
                        <li>close - Close the datepicker popup - <em>Esc</em></li>
                        <li>prevWeek - Move the cursor to the previous week - <em>Ctrl+Up</em></li>
                        <li>prevDay - Move the cursor to the previous day - <em>Ctrl+Left</em></li>
                        <li>nextDay - Move the cursor to the next day - <em>Ctrl+Right</em></li>
                        <li>nextWeek - Move the cursor to the next week - <em>Ctrl+Down</em></li>
                        </ul>
                        The command name is the key name and is used to add the command to a layout
                        with '{button:name}' or '{link:name}'. Each has the following attributes.
                        @property text {string} The field in the regional settings for the displayed text.
                        @property status {string} The field in the regional settings for the status text.
                        @property keystroke {object} The keystroke to trigger the action, with attributes:
                                <code>keyCode</code> {number} the code for the keystroke,
                                <code>ctrlKey</code> {boolean} <code>true</code> if <em>Ctrl</em> is required,
                                <code>altKey</code> {boolean} <code>true</code> if <em>Alt</em> is required,
                                <code>shiftKey</code> {boolean} <code>true</code> if <em>Shift</em> is required.
                        @property enabled {DatepickCommandEnabled} The function that indicates the command is enabled.
                        @property date {DatepickCommandDate} The function to get the date associated with this action.
                        @property action {DatepickCommandAction} The function that implements the action. */
                commands: {
                        prev: {text: 'prevText', status: 'prevStatus', // Previous month
                                keystroke: {keyCode: 33}, // Page up
                                enabled: function(inst) {
                                        var minDate = inst.curMinDate();
                                        return (!minDate || plugin.add(plugin.day(
                                                plugin._applyMonthsOffset(plugin.add(plugin.newDate(inst.drawDate),
                                                1 - inst.options.monthsToStep, 'm'), inst), 1), -1, 'd').
                                                getTime() >= minDate.getTime()); },
                                date: function(inst) {
                                        return plugin.day(plugin._applyMonthsOffset(plugin.add(
                                                plugin.newDate(inst.drawDate), -inst.options.monthsToStep, 'm'), inst), 1); },
                                action: function(inst) {
                                        plugin.changeMonth(this, -inst.options.monthsToStep); }
                        },
                        prevJump: {text: 'prevJumpText', status: 'prevJumpStatus', // Previous year
                                keystroke: {keyCode: 33, ctrlKey: true}, // Ctrl + Page up
                                enabled: function(inst) {
                                        var minDate = inst.curMinDate();
                                        return (!minDate || plugin.add(plugin.day(
                                                plugin._applyMonthsOffset(plugin.add(plugin.newDate(inst.drawDate),
                                                1 - inst.options.monthsToJump, 'm'), inst), 1), -1, 'd').
                                                getTime() >= minDate.getTime()); },
                                date: function(inst) {
                                        return plugin.day(plugin._applyMonthsOffset(plugin.add(
                                                plugin.newDate(inst.drawDate), -inst.options.monthsToJump, 'm'), inst), 1); },
                                action: function(inst) {
                                        plugin.changeMonth(this, -inst.options.monthsToJump); }
                        },
                        next: {text: 'nextText', status: 'nextStatus', // Next month
                                keystroke: {keyCode: 34}, // Page down
                                enabled: function(inst) {
                                        var maxDate = inst.get('maxDate');
                                        return (!maxDate || plugin.day(plugin._applyMonthsOffset(plugin.add(
                                                plugin.newDate(inst.drawDate), inst.options.monthsToStep, 'm'), inst), 1).
                                                getTime() <= maxDate.getTime()); },
                                date: function(inst) {
                                        return plugin.day(plugin._applyMonthsOffset(plugin.add(
                                                plugin.newDate(inst.drawDate), inst.options.monthsToStep, 'm'), inst), 1); },
                                action: function(inst) {
                                        plugin.changeMonth(this, inst.options.monthsToStep); }
                        },
                        nextJump: {text: 'nextJumpText', status: 'nextJumpStatus', // Next year
                                keystroke: {keyCode: 34, ctrlKey: true}, // Ctrl + Page down
                                enabled: function(inst) {
                                        var maxDate = inst.get('maxDate');
                                        return (!maxDate || plugin.day(plugin._applyMonthsOffset(plugin.add(
                                                plugin.newDate(inst.drawDate), inst.options.monthsToJump, 'm'), inst), 1).
                                                getTime() <= maxDate.getTime()); },
                                date: function(inst) {
                                        return plugin.day(plugin._applyMonthsOffset(plugin.add(
                                                plugin.newDate(inst.drawDate), inst.options.monthsToJump, 'm'), inst), 1); },
                                action: function(inst) {
                                        plugin.changeMonth(this, inst.options.monthsToJump); }
                        },
                        current: {text: 'currentText', status: 'currentStatus', // Current month
                                keystroke: {keyCode: 36, ctrlKey: true}, // Ctrl + Home
                                enabled: function(inst) {
                                        var minDate = inst.curMinDate();
                                        var maxDate = inst.get('maxDate');
                                        var curDate = inst.selectedDates[0] || plugin.today();
                                        return (!minDate || curDate.getTime() >= minDate.getTime()) &&
                                                (!maxDate || curDate.getTime() <= maxDate.getTime()); },
                                date: function(inst) {
                                        return inst.selectedDates[0] || plugin.today(); },
                                action: function(inst) {
                                        var curDate = inst.selectedDates[0] || plugin.today();
                                        plugin.showMonth(this, curDate.getFullYear(), curDate.getMonth() + 1); }
                        },
                        today: {text: 'todayText', status: 'todayStatus', // Today's month
                                keystroke: {keyCode: 36, ctrlKey: true}, // Ctrl + Home
                                enabled: function(inst) {
                                        var minDate = inst.curMinDate();
                                        var maxDate = inst.get('maxDate');
                                        return (!minDate || plugin.today().getTime() >= minDate.getTime()) &&
                                                (!maxDate || plugin.today().getTime() <= maxDate.getTime()); },
                                date: function(inst) { return plugin.today(); },
                                action: function(inst) { plugin.showMonth(this); }
                        },
                        clear: {text: 'clearText', status: 'clearStatus', // Clear the datepicker
                                keystroke: {keyCode: 35, ctrlKey: true}, // Ctrl + End
                                enabled: function(inst) { return true; },
                                date: function(inst) { return null; },
                                action: function(inst) { plugin.clear(this); }
                        },
                        close: {text: 'closeText', status: 'closeStatus', // Close the datepicker
                                keystroke: {keyCode: 27}, // Escape
                                enabled: function(inst) { return true; },
                                date: function(inst) { return null; },
                                action: function(inst) { plugin.hide(this); }
                        },
                        prevWeek: {text: 'prevWeekText', status: 'prevWeekStatus', // Previous week
                                keystroke: {keyCode: 38, ctrlKey: true}, // Ctrl + Up
                                enabled: function(inst) {
                                        var minDate = inst.curMinDate();
                                        return (!minDate || plugin.add(plugin.newDate(inst.drawDate), -7, 'd').
                                                getTime() >= minDate.getTime()); },
                                date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), -7, 'd'); },
                                action: function(inst) { plugin.changeDay(this, -7); }
                        },
                        prevDay: {text: 'prevDayText', status: 'prevDayStatus', // Previous day
                                keystroke: {keyCode: 37, ctrlKey: true}, // Ctrl + Left
                                enabled: function(inst) {
                                        var minDate = inst.curMinDate();
                                        return (!minDate || plugin.add(plugin.newDate(inst.drawDate), -1, 'd').
                                                getTime() >= minDate.getTime()); },
                                date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), -1, 'd'); },
                                action: function(inst) { plugin.changeDay(this, -1); }
                        },
                        nextDay: {text: 'nextDayText', status: 'nextDayStatus', // Next day
                                keystroke: {keyCode: 39, ctrlKey: true}, // Ctrl + Right
                                enabled: function(inst) {
                                        var maxDate = inst.get('maxDate');
                                        return (!maxDate || plugin.add(plugin.newDate(inst.drawDate), 1, 'd').
                                                getTime() <= maxDate.getTime()); },
                                date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), 1, 'd'); },
                                action: function(inst) { plugin.changeDay(this, 1); }
                        },
                        nextWeek: {text: 'nextWeekText', status: 'nextWeekStatus', // Next week
                                keystroke: {keyCode: 40, ctrlKey: true}, // Ctrl + Down
                                enabled: function(inst) {
                                        var maxDate = inst.get('maxDate');
                                        return (!maxDate || plugin.add(plugin.newDate(inst.drawDate), 7, 'd').
                                                getTime() <= maxDate.getTime()); },
                                date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), 7, 'd'); },
                                action: function(inst) { plugin.changeDay(this, 7); }
                        }
                },

                /** Determine whether a command is enabled.
                        @callback DatepickCommandEnabled
                        @param inst {object} The current instance settings.
                        @return {boolean} <code>true</code> if this command is enabled, <code>false</code> if not.
                        @example enabled: function(inst) {
        return !!inst.curMinDate();
 } */

                /** Calculate the representative date for a command.
                        @callback DatepickCommandDate
                        @param inst {object} The current instance settings.
                        @return {Date} A date appropriate for this command.
                        @example date: function(inst) {
        return inst.curMinDate();
 } */

                /** Perform the action for a command.
                        @callback DatepickCommandAction
                        @param inst {object} The current instance settings.
                        @example date: function(inst) {
        $.datepick.setDate(inst.elem, inst.curMinDate());
 } */

                /** Calculate the week of the year for a date.
                        @callback DatepickCalculateWeek
                        @param date {Date} The date to evaluate.
                        @return {number} The week of the year.
                        @example calculateWeek: function(date) {
        return Math.floor(($.datepick.dayOfYear(date) - 1) / 7) + 1;
 } */

                /** Provide information about an individual date shown in the calendar.
                        @callback DatepickOnDate
                        @param date {Date} The date to evaluate.
                        @return {object} Information about that date, with the properties above.
                        @property selectable {boolean} <code>true</code> if this date can be selected.
                        @property dateClass {string} Class(es) to be applied to the date.
                        @property content {string} The date cell content.
                        @property tooltip {string} A popup tooltip for the date.
                        @example onDate: function(date) {
        return {selectable: date.getDay() > 0 && date.getDay() &lt; 5,
                dateClass: date.getDay() == 4 ? 'last-day' : ''};
 } */

                /** Update the datepicker display.
                        @callback DatepickOnShow
                        @param picker {jQuery} The datepicker <code>div</code> to be shown.
                        @param inst {object} The current instance settings.
                        @example onShow: function(picker, inst) {
        picker.append('&lt;button type="button">Hi&lt;/button>').
                find('button:last').click(function() {
                        alert('Hi!');
                });
 } */

                /** React to navigating through the months/years.
                        @callback DatepickOnChangeMonthYear
                        @param year {number} The new year.
                        @param month {number} The new month (1 to 12).
                        @example onChangeMonthYear: function(year, month) {
        alert('Now in ' + month + '/' + year);
 } */
                        
                /** Datepicker on select callback.
                        Triggered when a date is selected.
                        @callback DatepickOnSelect
                        @param dates {Date[]} The selected date(s).
                        @example onSelect: function(dates) {
        alert('Selected ' + dates);
 } */
                        
                /** Datepicker on close callback.
                        Triggered when a popup calendar is closed.
                        @callback DatepickOnClose
                        @param dates {Date[]} The selected date(s).
                        @example onClose: function(dates) {
        alert('Selected ' + dates);
 } */
                        
                /** Default settings for the plugin.
                        @property [pickerClass=''] {string} CSS class to add to this instance of the datepicker.
                        @property [showOnFocus=true] {boolean} <code>true</code> for popup on focus, <code>false</code> for not.
                        @property [showTrigger=null] {string|Element|jQuery} Element to be cloned for a trigger, <code>null</code> for none.
                        @property [showAnim='show'] {string} Name of jQuery animation for popup, '' for no animation.
                        @property [showOptions=null] {object} Options for enhanced animations.
                        @property [showSpeed='normal'] {string} Duration of display/closure.
                        @property [popupContainer=null] {string|Element|jQuery} The element to which a popup calendar is added, <code>null</code> for body.
                        @property [alignment='bottom'] {string} Alignment of popup - with nominated corner of input:
                                                'top' or 'bottom' aligns depending on language direction,
                                                'topLeft', 'topRight', 'bottomLeft', 'bottomRight'.
                        @property [fixedWeeks=false] {boolean} <code>true</code> to always show 6 weeks, <code>false</code> to only show as many as are needed.
                        @property [firstDay=0] {number} First day of the week, 0 = Sunday, 1 = Monday, etc.
                        @property [calculateWeek=this.iso8601Week] {DatepickCalculateWeek} Calculate week of the year from a date, <code>null</code> for ISO8601.
                        @property [monthsToShow=1] {number|number[]} How many months to show, cols or [rows, cols].
                        @property [monthsOffset=0] {number} How many months to offset the primary month by;
                                                may be a function that takes the date and returns the offset.
                        @property [monthsToStep=1] {number} How many months to move when prev/next clicked.
                        @property [monthsToJump=12] {number} How many months to move when large prev/next clicked.
                        @property [useMouseWheel=true] {boolean} <code>true</code> to use mousewheel if available, <code>false</code> to never use it.
                        @property [changeMonth=true] {boolean} <code>true</code> to change month/year via drop-down, <code>false</code> for navigation only.
                        @property [yearRange='c-10:c+10'] {string} Range of years to show in drop-down: 'any' for direct text entry
                                                or 'start:end', where start/end are '+-nn' for relative to today
                                                or 'c+-nn' for relative to the currently selected date
                                                or 'nnnn' for an absolute year.
                        @property [shortYearCutoff='+10'] {string} Cutoff for two-digit year in the current century.
                        @property [showOtherMonths=false] {boolean} <code>true</code> to show dates from other months, <code>false</code> to not show them.
                        @property [selectOtherMonths=false] {boolean} <code>true</code> to allow selection of dates from other months too.
                        @property [defaultDate=null] {string|number|Date} Date to show if no other selected.
                        @property [selectDefaultDate=false] {boolean} <code>true</code> to pre-select the default date if no other is chosen.
                        @property [minDate=null] {string|number|Date} The minimum selectable date.
                        @property [maxDate=null] {string|number|Date} The maximum selectable date.
                        @property [dateFormat='mm/dd/yyyy'] {string} Format for dates.
                        @property [autoSize=false] {boolean} <code>true</code> to size the input field according to the date format.
                        @property [rangeSelect=false] {boolean} Allows for selecting a date range on one date picker.
                        @property [rangeSeparator=' - '] {string} Text between two dates in a range.
                        @property [multiSelect=0] {number} Maximum number of selectable dates, zero for single select.
                        @property [multiSeparator=','] {string} Text between multiple dates.
                        @property [onDate=null] {DatepickOnDate} Callback as a date is added to the datepicker.
                        @property [onShow=null] {DatepickOnShow} Callback just before a datepicker is shown.
                        @property [onChangeMonthYear=null] {DatepickOnChangeMonthYear} Callback when a new month/year is selected.
                        @property [onSelect=null] {DatepickOnSelect} Callback when a date is selected.
                        @property [onClose=null] {DatepickOnClose} Callback when a datepicker is closed.
                        @property [altField=null] {string|Element|jQuery} Alternate field to update in synch with the datepicker.
                        @property [altFormat=null] {string} Date format for alternate field, defaults to <code>dateFormat</code>.
                        @property [constrainInput=true] {boolean} <code>true</code> to constrain typed input to <code>dateFormat</code> allowed characters.
                        @property [commandsAsDateFormat=false] {boolean} <code>true</code> to apply
                                                <code><a href="#formatDate">formatDate</a></code> to the command texts.
                        @property [commands=this.commands] {object} Command actions that may be added to a layout by name. */
                defaultOptions: {
                        pickerClass: '',
                        showOnFocus: true,
                        showTrigger: null,
                        showAnim: 'show',
                        showOptions: {},
                        showSpeed: 'normal',
                        popupContainer: null,
                        alignment: 'bottom',
                        fixedWeeks: false,
                        firstDay: 0,
                        calculateWeek: null, // this.iso8601Week,
                        monthsToShow: 1,
                        monthsOffset: 0,
                        monthsToStep: 1,
                        monthsToJump: 12,
                        useMouseWheel: true,
                        changeMonth: true,
                        yearRange: 'c-10:c+10',
                        shortYearCutoff: '+10',
                        showOtherMonths: false,
                        selectOtherMonths: false,
                        defaultDate: null,
                        selectDefaultDate: false,
                        minDate: null,
                        maxDate: null,
                        dateFormat: 'mm/dd/yyyy',
                        autoSize: false,
                        rangeSelect: false,
                        rangeSeparator: ' - ',
                        multiSelect: 0,
                        multiSeparator: ',',
                        onDate: null,
                        onShow: null,
                        onChangeMonthYear: null,
                        onSelect: null,
                        onClose: null,
                        altField: null,
                        altFormat: null,
                        constrainInput: true,
                        commandsAsDateFormat: false,
                        commands: {} // this.commands
                },

                /** Localisations for the plugin.
                        Entries are objects indexed by the language code ('' being the default US/English).
                        Each object has the following attributes.
                        @property [monthNames=['January','February','March','April','May','June','July','August','September','October','November','December']]
                                                The long names of the months.
                        @property [monthNamesShort=['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec']]
                                                The short names of the months.
                        @property [dayNames=['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday']]
                                                The long names of the days of the week.
                        @property [dayNamesShort=['Sun','Mon','Tue','Wed','Thu','Fri','Sat']] The short names of the days of the week.
                        @property [dayNamesMin=['Su','Mo','Tu','We','Th','Fr','Sa']] The minimal names of the days of the week.
                        @property [dateFormat='mm/dd/yyyy'] {string} See options on <code><a href="#formatDate">formatDate</a></code>.
                        @property [firstDay=0] {number} The first day of the week, Sun = 0, Mon = 1, etc.
                        @property [renderer=this.defaultRenderer] {string} The rendering templates.
                        @property [prevText='&lt;Prev'] {string} Text for the previous month command.
                        @property [prevStatus='Show the previous month'] {string} Status text for the previous month command.
                        @property [prevJumpText='&lt;&lt;'] {string} Text for the previous year command.
                        @property [prevJumpStatus='Show the previous year'] {string} Status text for the previous year command.
                        @property [nextText='Next&gt;'] {string} Text for the next month command.
                        @property [nextStatus='Show the next month'] {string} Status text for the next month command.
                        @property [nextJumpText='&gt;&gt;'] {string} Text for the next year command.
                        @property [nextJumpStatus='Show the next year'] {string} Status text for the next year command.
                        @property [currentText='Current'] {string} Text for the current month command.
                        @property [currentStatus='Show the current month'] {string} Status text for the current month command.
                        @property [todayText='Today'] {string} Text for the today's month command.
                        @property [todayStatus='Show today\'s month'] {string} Status text for the today's month command.
                        @property [clearText='Clear'] {string} Text for the clear command.
                        @property [clearStatus='Clear all the dates'] {string} Status text for the clear command.
                        @property [closeText='Close'] {string} Text for the close command.
                        @property [closeStatus='Close the datepicker'] {string} Status text for the close command.
                        @property [yearStatus='Change the year'] {string} Status text for year selection.
                        @property [monthStatus='Change the month'] {string} Status text for month selection.
                        @property [weekText='Wk'] {string} Text for week of the year column header.
                        @property [weekStatus='Week of the year'] {string} Status text for week of the year column header.
                        @property [dayStatus='Select DD,&nbsp;M&nbsp;d,&nbsp;yyyy'] {string} Status text for selectable days.
                        @property [defaultStatus='Select a date'] {string} Status text shown by default.
                        @property [isRTL=false] {boolean} <code>true</code> if language is right-to-left. */
                regionalOptions: { // Available regional settings, indexed by language/country code
                        '': { // Default regional settings - English/US
                                monthNames: ['January', 'February', 'March', 'April', 'May', 'June',
                                'July', 'August', 'September', 'October', 'November', 'December'],
                                monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
                                dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
                                dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
                                dayNamesMin: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
                                dateFormat: 'mm/dd/yyyy',
                                firstDay: 0,
                                renderer: {}, // this.defaultRenderer
                                prevText: '&lt;Prev',
                                prevStatus: 'Show the previous month',
                                prevJumpText: '&lt;&lt;',
                                prevJumpStatus: 'Show the previous year',
                                nextText: 'Next&gt;',
                                nextStatus: 'Show the next month',
                                nextJumpText: '&gt;&gt;',
                                nextJumpStatus: 'Show the next year',
                                currentText: 'Current',
                                currentStatus: 'Show the current month',
                                todayText: 'Today',
                                todayStatus: 'Show today\'s month',
                                clearText: 'Clear',
                                clearStatus: 'Clear all the dates',
                                closeText: 'Close',
                                closeStatus: 'Close the datepicker',
                                yearStatus: 'Change the year',
                                monthStatus: 'Change the month',
                                weekText: 'Wk',
                                weekStatus: 'Week of the year',
                                dayStatus: 'Select DD, M d, yyyy',
                                defaultStatus: 'Select a date',
                                isRTL: false
                        }
                },
                
                /** Names of getter methods - those that can't be chained. */
                _getters: ['getDate', 'isDisabled', 'isSelectable', 'retrieveDate'],

                _disabled: [],
                
                _popupClass: pluginName + '-popup', // Marker for popup division
                _triggerClass: pluginName + '-trigger', // Marker for trigger element
                _disableClass: pluginName + '-disable', // Marker for disabled element
                _monthYearClass: pluginName + '-month-year', // Marker for month/year inputs
                _curMonthClass: pluginName + '-month-', // Marker for current month/year
                _anyYearClass: pluginName + '-any-year', // Marker for year direct input
                _curDoWClass: pluginName + '-dow-', // Marker for day of week

                _ticksTo1970: (((1970 - 1) * 365 + Math.floor(1970 / 4) - Math.floor(1970 / 100) +
                        Math.floor(1970 / 400)) * 24 * 60 * 60 * 10000000),
                _msPerDay: 24 * 60 * 60 * 1000,

                /** The date format for use with Atom (RFC 3339/ISO 8601). */
                ATOM: 'yyyy-mm-dd',
                /** The date format for use with cookies. */
                COOKIE: 'D, dd M yyyy',
                /** The date format for full display. */
                FULL: 'DD, MM d, yyyy',
                /** The date format for use with ISO 8601. */
                ISO_8601: 'yyyy-mm-dd',
                /** The date format for Julian dates. */
                JULIAN: 'J',
                /** The date format for use with RFC 822. */
                RFC_822: 'D, d M yy',
                /** The date format for use with RFC 850. */
                RFC_850: 'DD, dd-M-yy',
                /** The date format for use with RFC 1036. */
                RFC_1036: 'D, d M yy',
                /** The date format for use with RFC 1123. */
                RFC_1123: 'D, d M yyyy',
                /** The date format for use with RFC 2822. */
                RFC_2822: 'D, d M yyyy',
                /** The date format for use with RSS (RFC 822). */
                RSS: 'D, d M yy',
                /** The date format for Windows ticks. */
                TICKS: '!',
                /** The date format for Unix timestamp. */
                TIMESTAMP: '@',
                /** The date format for use with W3C (ISO 8601). */
                W3C: 'yyyy-mm-dd',

                /** Format a date object into a string value.
                        The format can be combinations of the following:
                        <ul>
                        <li>d  - day of month (no leading zero)</li>
                        <li>dd - day of month (two digit)</li>
                        <li>o  - day of year (no leading zeros)</li>
                        <li>oo - day of year (three digit)</li>
                        <li>D  - day name short</li>
                        <li>DD - day name long</li>
                        <li>w  - week of year (no leading zero)</li>
                        <li>ww - week of year (two digit)</li>
                        <li>m  - month of year (no leading zero)</li>
                        <li>mm - month of year (two digit)</li>
                        <li>M  - month name short</li>
                        <li>MM - month name long</li>
                        <li>yy - year (two digit)</li>
                        <li>yyyy - year (four digit)</li>
                        <li>@  - Unix timestamp (s since 01/01/1970)</li>
                        <li>!  - Windows ticks (100ns since 01/01/0001)</li>
                        <li>'...' - literal text</li>
                        <li>'' - single quote</li>
                        </ul>
                        @param [format=dateFormat] {string} The desired format of the date.
                        @param date {Date} The date value to format.
                        @param [settings] {object} With the properties shown below.
                        @property [dayNamesShort] {string[]} Abbreviated names of the days from Sunday.
                        @property [dayNames] {string[]} Names of the days from Sunday.
                        @property [monthNamesShort] {string[]} Abbreviated names of the months.
                        @property [monthNames] {string[]} Names of the months.
                        @property [calculateWeek] {DatepickCalculateWeek} Function that determines week of the year.
                        @return {string} The date in the above format.
                        @example var display = $.datepick.formatDate('yyyy-mm-dd', new Date(2014, 12-1, 25)) */
                formatDate: function(format, date, settings) {
                        if (typeof format !== 'string') {
                                settings = date;
                                date = format;
                                format = '';
                        }
                        if (!date) {
                                return '';
                        }
                        format = format || this.defaultOptions.dateFormat;
                        settings = settings || {};
                        var dayNamesShort = settings.dayNamesShort || this.defaultOptions.dayNamesShort;
                        var dayNames = settings.dayNames || this.defaultOptions.dayNames;
                        var monthNamesShort = settings.monthNamesShort || this.defaultOptions.monthNamesShort;
                        var monthNames = settings.monthNames || this.defaultOptions.monthNames;
                        var calculateWeek = settings.calculateWeek || this.defaultOptions.calculateWeek;
                        // Check whether a format character is doubled
                        var doubled = function(match, step) {
                                var matches = 1;
                                while (iFormat + matches < format.length && format.charAt(iFormat + matches) === match) {
                                        matches++;
                                }
                                iFormat += matches - 1;
                                return Math.floor(matches / (step || 1)) > 1;
                        };
                        // Format a number, with leading zeroes if necessary
                        var formatNumber = function(match, value, len, step) {
                                var num = '' + value;
                                if (doubled(match, step)) {
                                        while (num.length < len) {
                                                num = '0' + num;
                                        }
                                }
                                return num;
                        };
                        // Format a name, short or long as requested
                        var formatName = function(match, value, shortNames, longNames) {
                                return (doubled(match) ? longNames[value] : shortNames[value]);
                        };
                        var output = '';
                        var literal = false;
                        for (var iFormat = 0; iFormat < format.length; iFormat++) {
                                if (literal) {
                                        if (format.charAt(iFormat) === "'" && !doubled("'")) {
                                                literal = false;
                                        }
                                        else {
                                                output += format.charAt(iFormat);
                                        }
                                }
                                else {
                                        switch (format.charAt(iFormat)) {
                                                case 'd': output += formatNumber('d', date.getDate(), 2); break;
                                                case 'D': output += formatName('D', date.getDay(),
                                                        dayNamesShort, dayNames); break;
                                                case 'o': output += formatNumber('o', this.dayOfYear(date), 3); break;
                                                case 'w': output += formatNumber('w', calculateWeek(date), 2); break;
                                                case 'm': output += formatNumber('m', date.getMonth() + 1, 2); break;
                                                case 'M': output += formatName('M', date.getMonth(),
                                                        monthNamesShort, monthNames); break;
                                                case 'y':
                                                        output += (doubled('y', 2) ? date.getFullYear() :
                                                                (date.getFullYear() % 100 < 10 ? '0' : '') + date.getFullYear() % 100);
                                                        break;
                                                case '@': output += Math.floor(date.getTime() / 1000); break;
                                                case '!': output += date.getTime() * 10000 + this._ticksTo1970; break;
                                                case "'":
                                                        if (doubled("'")) {
                                                                output += "'";
                                                        }
                                                        else {
                                                                literal = true;
                                                        }
                                                        break;
                                                default:
                                                        output += format.charAt(iFormat);
                                        }
                                }
                        }
                        return output;
                },

                /** Parse a string value into a date object.
                        See <code><a href="#formatDate">formatDate</a></code> for the possible formats, plus:
                        <ul>
                        <li>* - ignore rest of string</li>
                        </ul>
                        @param format {string} The expected format of the date ('' for default datepicker format).
                        @param value {string} The date in the above format.
                        @param [settings] {object} With the properties shown above.
                        @property [shortYearCutoff] {number} the cutoff year for determining the century.
                        @property [dayNamesShort] {string[]} abbreviated names of the days from Sunday.
                        @property [dayNames] {string[]} names of the days from Sunday.
                        @property [monthNamesShort] {string[]} abbreviated names of the months.
                        @property [monthNames] {string[]} names of the months.
                        @return {Date} The extracted date value or <code>null</code> if value is blank.
                        @throws Errors if the format and/or value are missing, if the value doesn't match the format,
                                        or if the date is invalid.
                        @example var date = $.datepick.parseDate('dd/mm/yyyy', '25/12/2014') */
                parseDate: function(format, value, settings) {
                        if (value == null) {
                                throw 'Invalid arguments';
                        }
                        value = (typeof value === 'object' ? value.toString() : value + '');
                        if (value === '') {
                                return null;
                        }
                        format = format || this.defaultOptions.dateFormat;
                        settings = settings || {};
                        var shortYearCutoff = settings.shortYearCutoff || this.defaultOptions.shortYearCutoff;
                        shortYearCutoff = (typeof shortYearCutoff !== 'string' ? shortYearCutoff :
                                this.today().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
                        var dayNamesShort = settings.dayNamesShort || this.defaultOptions.dayNamesShort;
                        var dayNames = settings.dayNames || this.defaultOptions.dayNames;
                        var monthNamesShort = settings.monthNamesShort || this.defaultOptions.monthNamesShort;
                        var monthNames = settings.monthNames || this.defaultOptions.monthNames;
                        var year = -1;
                        var month = -1;
                        var day = -1;
                        var doy = -1;
                        var shortYear = false;
                        var literal = false;
                        // Check whether a format character is doubled
                        var doubled = function(match, step) {
                                var matches = 1;
                                while (iFormat + matches < format.length && format.charAt(iFormat + matches) === match) {
                                        matches++;
                                }
                                iFormat += matches - 1;
                                return Math.floor(matches / (step || 1)) > 1;
                        };
                        // Extract a number from the string value
                        var getNumber = function(match, step) {
                                var isDoubled = doubled(match, step);
                                var size = [2, 3, isDoubled ? 4 : 2, 11, 20]['oy@!'.indexOf(match) + 1];
                                var digits = new RegExp('^-?\\d{1,' + size + '}');
                                var num = value.substring(iValue).match(digits);
                                if (!num) {
                                        throw 'Missing number at position {0}'.replace(/\{0\}/, iValue);
                                }
                                iValue += num[0].length;
                                return parseInt(num[0], 10);
                        };
                        // Extract a name from the string value and convert to an index
                        var getName = function(match, shortNames, longNames, step) {
                                var names = (doubled(match, step) ? longNames : shortNames);
                                for (var i = 0; i < names.length; i++) {
                                        if (value.substr(iValue, names[i].length).toLowerCase() === names[i].toLowerCase()) {
                                                iValue += names[i].length;
                                                return i + 1;
                                        }
                                }
                                throw 'Unknown name at position {0}'.replace(/\{0\}/, iValue);
                        };
                        // Confirm that a literal character matches the string value
                        var checkLiteral = function() {
                                if (value.charAt(iValue) !== format.charAt(iFormat)) {
                                        throw 'Unexpected literal at position {0}'.replace(/\{0\}/, iValue);
                                }
                                iValue++;
                        };
                        var iValue = 0;
                        for (var iFormat = 0; iFormat < format.length; iFormat++) {
                                if (literal) {
                                        if (format.charAt(iFormat) === "'" && !doubled("'")) {
                                                literal = false;
                                        }
                                        else {
                                                checkLiteral();
                                        }
                                }
                                else {
                                        switch (format.charAt(iFormat)) {
                                                case 'd': day = getNumber('d'); break;
                                                case 'D': getName('D', dayNamesShort, dayNames); break;
                                                case 'o': doy = getNumber('o'); break;
                                                case 'w': getNumber('w'); break;
                                                case 'm': month = getNumber('m'); break;
                                                case 'M': month = getName('M', monthNamesShort, monthNames); break;
                                                case 'y':
                                                        var iSave = iFormat;
                                                        shortYear = !doubled('y', 2);
                                                        iFormat = iSave;
                                                        year = getNumber('y', 2);
                                                        break;
                                                case '@':
                                                        var date = this._normaliseDate(new Date(getNumber('@') * 1000));
                                                        year = date.getFullYear();
                                                        month = date.getMonth() + 1;
                                                        day = date.getDate();
                                                        break;
                                                case '!':
                                                        var date = this._normaliseDate(
                                                                new Date((getNumber('!') - this._ticksTo1970) / 10000));
                                                        year = date.getFullYear();
                                                        month = date.getMonth() + 1;
                                                        day = date.getDate();
                                                        break;
                                                case '*': iValue = value.length; break;
                                                case "'":
                                                        if (doubled("'")) {
                                                                checkLiteral();
                                                        }
                                                        else {
                                                                literal = true;
                                                        }
                                                        break;
                                                default: checkLiteral();
                                        }
                                }
                        }
                        if (iValue < value.length) {
                                throw 'Additional text found at end';
                        }
                        if (year === -1) {
                                year = this.today().getFullYear();
                        }
                        else if (year < 100 && shortYear) {
                                year += (shortYearCutoff === -1 ? 1900 : this.today().getFullYear() -
                                        this.today().getFullYear() % 100 - (year <= shortYearCutoff ? 0 : 100));
                        }
                        if (doy > -1) {
                                month = 1;
                                day = doy;
                                for (var dim = this.daysInMonth(year, month); day > dim;
                                                dim = this.daysInMonth(year, month)) {
                                        month++;
                                        day -= dim;
                                }
                        }
                        var date = this.newDate(year, month, day);
                        if (date.getFullYear() !== year || date.getMonth() + 1 !== month || date.getDate() !== day) {
                                throw 'Invalid date';
                        }
                        return date;
                },

                /** A date may be specified as an exact value or a relative one.
                        @param dateSpec {Date|number|string} The date as an object or string
                                        in the given format or an offset - numeric days from today,
                                        or string amounts and periods, e.g. '+1m +2w'.
                        @param defaultDate {Date} The date to use if no other supplied, may be <code>null</code>.
                        @param [currentDate] {Date} The current date as a possible basis for relative dates,
                                        if <code>null</code> today is used.
                        @param dateFormat {string} The expected date format - see <code><a href="#formatDate">formatDate</a></code>.
                        @param settings {object} With the properties shown above.
                        @property [shortYearCutoff] {number} The cutoff year for determining the century.
                        @property [dayNamesShort] {string[]} Abbreviated names of the days from Sunday.
                        @property [dayNames] {string[]} Names of the days from Sunday.
                        @property [monthNamesShort] {string[]} Abbreviated names of the months.
                        @property [monthNames] {string[]} Names of the months.
                        @return {Date} The decoded date.
                        @example $.datepick.determineDate('+1m +2w', new Date()) */
                determineDate: function(dateSpec, defaultDate, currentDate, dateFormat, settings) {
                        if (currentDate && typeof currentDate !== 'object') {
                                settings = dateFormat;
                                dateFormat = currentDate;
                                currentDate = null;
                        }
                        if (typeof dateFormat !== 'string') {
                                settings = dateFormat;
                                dateFormat = '';
                        }
                        var offsetString = function(offset) {
                                try {
                                        return plugin.parseDate(dateFormat, offset, settings);
                                }
                                catch (e) {
                                        // Ignore
                                }
                                offset = offset.toLowerCase();
                                var date = (offset.match(/^c/) && currentDate ? plugin.newDate(currentDate) : null) ||
                                        plugin.today();
                                var pattern = /([+-]?[0-9]+)\s*(d|w|m|y)?/g;
                                var matches = null;
                                while (matches = pattern.exec(offset)) {
                                        date = plugin.add(date, parseInt(matches[1], 10), matches[2] || 'd');
                                }
                                return date;
                        };
                        defaultDate = (defaultDate ? plugin.newDate(defaultDate) : null);
                        dateSpec = (dateSpec == null ? defaultDate :
                                (typeof dateSpec === 'string' ? offsetString(dateSpec) : (typeof dateSpec === 'number' ?
                                (isNaN(dateSpec) || dateSpec === Infinity || dateSpec === -Infinity ? defaultDate :
                                plugin.add(plugin.today(), dateSpec, 'd')) : plugin.newDate(dateSpec))));
                        return dateSpec;
                },

                /** Find the number of days in a given month.
                        @param year {Date|number} The date to get days for or the full year.
                        @param month {number} The month (1 to 12).
                        @return {number} The number of days in this month.
                        @example var days = $.datepick.daysInMonth(2014, 12) */
                daysInMonth: function(year, month) {
                        month = (year.getFullYear ? year.getMonth() + 1 : month);
                        year = (year.getFullYear ? year.getFullYear() : year);
                        return this.newDate(year, month + 1, 0).getDate();
                },

                /** Calculate the day of the year for a date.
                        @param year {Date|number} The date to get the day-of-year for or the full year.
                        @param month {number} The month (1-12).
                        @param day {number} The day.
                        @return {number} The day of the year.
                        @example var doy = $.datepick.dayOfYear(2014, 12, 25) */
                dayOfYear: function(year, month, day) {
                        var date = (year.getFullYear ? year : plugin.newDate(year, month, day));
                        var newYear = plugin.newDate(date.getFullYear(), 1, 1);
                        return Math.floor((date.getTime() - newYear.getTime()) / plugin._msPerDay) + 1;
                },

                /** Set as <code>calculateWeek</code> to determine the week of the year based on the ISO 8601 definition.
                        @param year {Date|number} The date to get the week for or the full year.
                        @param month {number} The month (1-12).
                        @param day {number} The day.
                        @return {number} The number of the week within the year that contains this date.
                        @example var week = $.datepick.iso8601Week(2014, 12, 25) */
                iso8601Week: function(year, month, day) {
                        var checkDate = (year.getFullYear ?
                                new Date(year.getTime()) : plugin.newDate(year, month, day));
                        // Find Thursday of this week starting on Monday
                        checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
                        var time = checkDate.getTime();
                        checkDate.setMonth(0, 1); // Compare with Jan 1
                        return Math.floor(Math.round((time - checkDate) / plugin._msPerDay) / 7) + 1;
                },

                /** Return today's date.
                        @return {Date} Today.
                        @example $.datepick.today() */
                today: function() {
                        return this._normaliseDate(new Date());
                },

                /** Return a new date.
                        @param year {Date|number} The date to clone or the year.
                        @param month {number} The month (1-12).
                        @param day {number} The day.
                        @return {Date} The date.
                        @example $.datepick.newDate(oldDate)
 $.datepick.newDate(2014, 12, 25) */
                newDate: function(year, month, day) {
                        return (!year ? null : (year.getFullYear ? this._normaliseDate(new Date(year.getTime())) :
                                new Date(year, month - 1, day, 12)));
                },

                /** Standardise a date into a common format - time portion is 12 noon.
                        @private
                        @param date {Date} The date to standardise.
                        @return {Date} The normalised date. */
                _normaliseDate: function(date) {
                        if (date) {
                                date.setHours(12, 0, 0, 0);
                        }
                        return date;
                },

                /** Set the year for a date.
                        @param date {Date} The original date.
                        @param year {number} The new year.
                        @return {Date} The updated date.
                        @example $.datepick.year(date, 2014) */
                year: function(date, year) {
                        date.setFullYear(year);
                        return this._normaliseDate(date);
                },

                /** Set the month for a date.
                        @param date  {Date} The original date.
                        @param month {number} The new month (1-12).
                        @return {Date} The updated date.
                        @example $.datepick.month(date, 12) */
                month: function(date, month) {
                        date.setMonth(month - 1);
                        return this._normaliseDate(date);
                },

                /** Set the day for a date.
                        @param date {Date} The original date.
                        @param day {number} The new day of the month.
                        @return {Date} The updated date.
                        @example $.datepick.day(date, 25) */
                day: function(date, day) {
                        date.setDate(day);
                        return this._normaliseDate(date);
                },

                /** Add a number of periods to a date.
                        @param date {Date} The original date.
                        @param amount {number} The number of periods.
                        @param period {string} The type of period d/w/m/y.
                        @return {Date} The updated date.
                        @example $.datepick.add(date, 10, 'd') */
                add: function(date, amount, period) {
                        if (period === 'd' || period === 'w') {
                                this._normaliseDate(date);
                                date.setDate(date.getDate() + amount * (period === 'w' ? 7 : 1));
                        }
                        else {
                                var year = date.getFullYear() + (period === 'y' ? amount : 0);
                                var month = date.getMonth() + (period === 'm' ? amount : 0);
                                date.setTime(plugin.newDate(year, month + 1,
                                        Math.min(date.getDate(), this.daysInMonth(year, month + 1))).getTime());
                        }
                        return date;
                },

                /** Apply the months offset value to a date.
                        @private
                        @param date {Date} The original date.
                        @param inst {object} The current instance settings.
                        @return {Date} The updated date. */
                _applyMonthsOffset: function(date, inst) {
                        var monthsOffset = inst.options.monthsOffset;
                        if ($.isFunction(monthsOffset)) {
                                monthsOffset = monthsOffset.apply(inst.elem[0], [date]);
                        }
                        return plugin.add(date, -monthsOffset, 'm');
                },

                _init: function() {
                        this.defaultOptions.commands = this.commands;
                        this.defaultOptions.calculateWeek = this.iso8601Week;
                        this.regionalOptions[''].renderer = this.defaultRenderer;
                        this._super();
                },

                _instSettings: function(elem, options) {
                        return {selectedDates: [], drawDate: null, pickingRange: false,
                                inline: ($.inArray(elem[0].nodeName.toLowerCase(), ['div', 'span']) > -1),
                                get: function(name) { // Get a setting value, computing if necessary
                                        if ($.inArray(name, ['defaultDate', 'minDate', 'maxDate']) > -1) { // Decode date settings
                                                return plugin.determineDate(this.options[name], null,
                                                        this.selectedDates[0], this.options.dateFormat, this.getConfig());
                                        }
                                        return this.options[name];
                                },
                                curMinDate: function() {
                                        return (this.pickingRange ? this.selectedDates[0] : this.get('minDate'));
                                },
                                getConfig: function() {
                                        return {dayNamesShort: this.options.dayNamesShort, dayNames: this.options.dayNames,
                                                monthNamesShort: this.options.monthNamesShort, monthNames: this.options.monthNames,
                                                calculateWeek: this.options.calculateWeek,
                                                shortYearCutoff: this.options.shortYearCutoff};
                                }
                        };
                },

                _postAttach: function(elem, inst) {
                        if (inst.inline) {
                                inst.drawDate = plugin._checkMinMax(plugin.newDate(inst.selectedDates[0] ||
                                        inst.get('defaultDate') || plugin.today()), inst);
                                inst.prevDate = plugin.newDate(inst.drawDate);
                                this._update(elem[0]);
                                if ($.fn.mousewheel) {
                                        elem.mousewheel(this._doMouseWheel);
                                }
                        }
                        else {
                                this._attachments(elem, inst);
                                elem.on('keydown.' + inst.name, this._keyDown).on('keypress.' + inst.name, this._keyPress).
                                        on('keyup.' + inst.name, this._keyUp);
                                if (elem.attr('disabled')) {
                                        this.disable(elem[0]);
                                }
                        }
                },

                _optionsChanged: function(elem, inst, options) {
                        if (options.calendar && options.calendar !== inst.options.calendar) {
                                var discardDate = function(name) {
                                        return (typeof inst.options[name] === 'object' ? null : inst.options[name]);
                                };
                                options = $.extend({defaultDate: discardDate('defaultDate'),
                                        minDate: discardDate('minDate'), maxDate: discardDate('maxDate')}, options);
                                inst.selectedDates = [];
                                inst.drawDate = null;
                        }
                        var dates = inst.selectedDates;
                        $.extend(inst.options, options);
                        this.setDate(elem[0], dates, null, false, true);
                        inst.pickingRange = false;
                        inst.drawDate = plugin.newDate(this._checkMinMax(
                                (inst.options.defaultDate ? inst.get('defaultDate') : inst.drawDate) ||
                                inst.get('defaultDate') || plugin.today(), inst));
                        if (!inst.inline) {
                                this._attachments(elem, inst);
                        }
                        if (inst.inline || inst.div) {
                                this._update(elem[0]);
                        }
                },

                /** Attach events and trigger, if necessary.
                        @private
                        @param elem {jQuery} The control to affect.
                        @param inst {object} The current instance settings. */
                _attachments: function(elem, inst) {
                        elem.off('focus.' + inst.name);
                        if (inst.options.showOnFocus) {
                                elem.on('focus.' + inst.name, this.show);
                        }
                        if (inst.trigger) {
                                inst.trigger.remove();
                        }
                        var trigger = inst.options.showTrigger;
                        inst.trigger = (!trigger ? $([]) :
                                $(trigger).clone().removeAttr('id').addClass(this._triggerClass)
                                        [inst.options.isRTL ? 'insertBefore' : 'insertAfter'](elem).
                                        click(function() {
                                                if (!plugin.isDisabled(elem[0])) {
                                                        plugin[plugin.curInst === inst ? 'hide' : 'show'](elem[0]);
                                                }
                                        }));
                        this._autoSize(elem, inst);
                        var dates = this._extractDates(inst, elem.val());
                        if (dates) {
                                this.setDate(elem[0], dates, null, true);
                        }
                        var defaultDate = inst.get('defaultDate');
                        if (inst.options.selectDefaultDate && defaultDate && inst.selectedDates.length === 0) {
                                this.setDate(elem[0], plugin.newDate(defaultDate || plugin.today()));
                        }
                },

                /** Apply the maximum length for the date format.
                        @private
                        @param elem {jQuery} The control to affect.
                        @param inst {object} The current instance settings. */
                _autoSize: function(elem, inst) {
                        if (inst.options.autoSize && !inst.inline) {
                                var date = plugin.newDate(2009, 10, 20); // Ensure double digits
                                var dateFormat = inst.options.dateFormat;
                                if (dateFormat.match(/[DM]/)) {
                                        var findMax = function(names) {
                                                var max = 0;
                                                var maxI = 0;
                                                for (var i = 0; i < names.length; i++) {
                                                        if (names[i].length > max) {
                                                                max = names[i].length;
                                                                maxI = i;
                                                        }
                                                }
                                                return maxI;
                                        };
                                        date.setMonth(findMax(inst.options[dateFormat.match(/MM/) ? // Longest month
                                                'monthNames' : 'monthNamesShort']));
                                        date.setDate(findMax(inst.options[dateFormat.match(/DD/) ? // Longest day
                                                'dayNames' : 'dayNamesShort']) + 20 - date.getDay());
                                }
                                inst.elem.attr('size', plugin.formatDate(dateFormat, date, inst.getConfig()).length);
                        }
                },

                _preDestroy: function(elem, inst) {
                        if (inst.trigger) {
                                inst.trigger.remove();
                        }
                        elem.empty().off('.' + inst.name);
                        if (inst.inline && $.fn.mousewheel) {
                                elem.unmousewheel();
                        }
                        if (!inst.inline && inst.options.autoSize) {
                                elem.removeAttr('size');
                        }
                },

                /** Apply multiple event functions.
                        @param fns {function} The functions to apply.
                        @example onShow: multipleEvents(fn1, fn2, ...) */
                multipleEvents: function(fns) {
                        var funcs = arguments;
                        return function(args) {
                                for (var i = 0; i < funcs.length; i++) {
                                        funcs[i].apply(this, arguments);
                                }
                        };
                },

                /** Enable the control.
                        @param elem {Element} The control to affect.
                        @example $(selector).datepick('enable') */
                enable: function(elem) {
                        elem = $(elem);
                        if (!elem.hasClass(this._getMarker())) {
                                return;
                        }
                        var inst = this._getInst(elem);
                        if (inst.inline) {
                                elem.children('.' + this._disableClass).remove().end().
                                        find('button,select').prop('disabled', false).end().
                                        find('a').attr('href', 'javascript:void(0)');
                        }
                        else {
                                elem.prop('disabled', false);
                                inst.trigger.filter('button.' + this._triggerClass).prop('disabled', false).end().
                                        filter('img.' + this._triggerClass).css({opacity: '1.0', cursor: ''});
                        }
                        this._disabled = $.map(this._disabled,
                                function(value) { return (value === elem[0] ? null : value); }); // Delete entry
                },

                /** Disable the control.
                        @param elem {Element} The control to affect.
                        @example $(selector).datepick('disable') */
                disable: function(elem) {
                        elem = $(elem);
                        if (!elem.hasClass(this._getMarker())) {
                                return;
                        }
                        var inst = this._getInst(elem);
                        if (inst.inline) {
                                var inline = elem.children(':last');
                                var offset = inline.offset();
                                var relOffset = {left: 0, top: 0};
                                inline.parents().each(function() {
                                        if ($(this).css('position') === 'relative') {
                                                relOffset = $(this).offset();
                                                return false;
                                        }
                                });
                                var zIndex = elem.css('zIndex');
                                zIndex = (zIndex === 'auto' ? 0 : parseInt(zIndex, 10)) + 1;
                                elem.prepend('<div class="' + this._disableClass + '" style="' +
                                        'width: ' + inline.outerWidth() + 'px; height: ' + inline.outerHeight() +
                                        'px; left: ' + (offset.left - relOffset.left) + 'px; top: ' +
                                        (offset.top - relOffset.top) + 'px; z-index: ' + zIndex + '"></div>').
                                        find('button,select').prop('disabled', true).end().
                                        find('a').removeAttr('href');
                        }
                        else {
                                elem.prop('disabled', true);
                                inst.trigger.filter('button.' + this._triggerClass).prop('disabled', true).end().
                                        filter('img.' + this._triggerClass).css({opacity: '0.5', cursor: 'default'});
                        }
                        this._disabled = $.map(this._disabled,
                                function(value) { return (value === elem[0] ? null : value); }); // Delete entry
                        this._disabled.push(elem[0]);
                },

                /** Is the first field in a jQuery collection disabled as a datepicker?
                        @param elem {Element} The control to examine.
                        @return {boolean} <code>true</code> if disabled, <code>false</code> if enabled.
                        @example if ($(selector).datepick('isDisabled')) {...} */
                isDisabled: function(elem) {
                        return (elem && $.inArray(elem, this._disabled) > -1);
                },

                /** Show a popup datepicker.
                        @param elem {Event|Element} a focus event or the control to use.
                        @example $(selector).datepick('show') */
                show: function(elem) {
                        elem = $(elem.target || elem);
                        var inst = plugin._getInst(elem);
                        if (plugin.curInst === inst) {
                                return;
                        }
                        if (plugin.curInst) {
                                plugin.hide(plugin.curInst, true);
                        }
                        if (!$.isEmptyObject(inst)) {
                                // Retrieve existing date(s)
                                inst.lastVal = null;
                                inst.selectedDates = plugin._extractDates(inst, elem.val());
                                inst.pickingRange = false;
                                inst.drawDate = plugin._checkMinMax(plugin.newDate(inst.selectedDates[0] ||
                                        inst.get('defaultDate') || plugin.today()), inst);
                                inst.prevDate = plugin.newDate(inst.drawDate);
                                plugin.curInst = inst;
                                // Generate content
                                plugin._update(elem[0], true);
                                // Adjust position before showing
                                var offset = plugin._checkOffset(inst);
                                inst.div.css({left: offset.left, top: offset.top});
                                // And display
                                var showAnim = inst.options.showAnim;
                                var showSpeed = inst.options.showSpeed;
                                showSpeed = (showSpeed === 'normal' && $.ui &&
                                        parseInt($.ui.version.substring(2)) >= 8 ? '_default' : showSpeed);
                                if ($.effects && ($.effects[showAnim] || ($.effects.effect && $.effects.effect[showAnim]))) {
                                        var data = inst.div.data(); // Update old effects data
                                        for (var key in data) {
                                                if (key.match(/^ec\.storage\./)) {
                                                        data[key] = inst._mainDiv.css(key.replace(/ec\.storage\./, ''));
                                                }
                                        }
                                        inst.div.data(data).show(showAnim, inst.options.showOptions, showSpeed);
                                }
                                else {
                                        inst.div[showAnim || 'show'](showAnim ? showSpeed : 0);
                                }
                        }
                },

                /** Extract possible dates from a string.
                        @private
                        @param inst {object} The current instance settings.
                        @param text {string} The text to extract from.
                        @return {Date[]} The extracted dates. */
                _extractDates: function(inst, datesText) {
                        if (datesText === inst.lastVal) {
                                return;
                        }
                        inst.lastVal = datesText;
                        datesText = datesText.split(inst.options.multiSelect ? inst.options.multiSeparator :
                                (inst.options.rangeSelect ? inst.options.rangeSeparator : '\x00'));
                        var dates = [];
                        for (var i = 0; i < datesText.length; i++) {
                                try {
                                        var date = plugin.parseDate(inst.options.dateFormat, datesText[i], inst.getConfig());
                                        if (date) {
                                                var found = false;
                                                for (var j = 0; j < dates.length; j++) {
                                                        if (dates[j].getTime() === date.getTime()) {
                                                                found = true;
                                                                break;
                                                        }
                                                }
                                                if (!found) {
                                                        dates.push(date);
                                                }
                                        }
                                }
                                catch (e) {
                                        // Ignore
                                }
                        }
                        dates.splice(inst.options.multiSelect || (inst.options.rangeSelect ? 2 : 1), dates.length);
                        if (inst.options.rangeSelect && dates.length === 1) {
                                dates[1] = dates[0];
                        }
                        return dates;
                },

                /** Update the datepicker display.
                        @private
                        @param elem {Event|Element} a focus event or the control to use.
                        @param hidden {boolean} <code>true</code> to initially hide the datepicker. */
                _update: function(elem, hidden) {
                        elem = $(elem.target || elem);
                        var inst = plugin._getInst(elem);
                        if (!$.isEmptyObject(inst)) {
                                if (inst.inline || plugin.curInst === inst) {
                                        if ($.isFunction(inst.options.onChangeMonthYear) && (!inst.prevDate ||
                                                        inst.prevDate.getFullYear() !== inst.drawDate.getFullYear() ||
                                                        inst.prevDate.getMonth() !== inst.drawDate.getMonth())) {
                                                inst.options.onChangeMonthYear.apply(elem[0],
                                                        [inst.drawDate.getFullYear(), inst.drawDate.getMonth() + 1]);
                                        }
                                }
                                if (inst.inline) {
                                        elem.html(this._generateContent(elem[0], inst));
                                }
                                else if (plugin.curInst === inst) {
                                        if (!inst.div) {
                                                inst.div = $('<div></div>').addClass(this._popupClass).
                                                        css({display: (hidden ? 'none' : 'static'), position: 'absolute',
                                                                left: elem.offset().left, top: elem.offset().top + elem.outerHeight()}).
                                                        appendTo($(inst.options.popupContainer || 'body'));
                                                if ($.fn.mousewheel) {
                                                        inst.div.mousewheel(this._doMouseWheel);
                                                }
                                        }
                                        inst.div.html(this._generateContent(elem[0], inst));
                                        elem.focus();
                                }
                        }
                },

                /** Update the input field and any alternate field with the current dates.
                        @private
                        @param elem {Element} The control to use.
                        @param keyUp {boolean} <code>true</code> if coming from <code>keyUp</code> processing (internal). */
                _updateInput: function(elem, keyUp) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst)) {
                                var value = '';
                                var altValue = '';
                                var sep = (inst.options.multiSelect ? inst.options.multiSeparator :
                                        inst.options.rangeSeparator);
                                var altFormat = inst.options.altFormat || inst.options.dateFormat;
                                for (var i = 0; i < inst.selectedDates.length; i++) {
                                        value += (keyUp ? '' : (i > 0 ? sep : '') + plugin.formatDate(
                                                inst.options.dateFormat, inst.selectedDates[i], inst.getConfig()));
                                        altValue += (i > 0 ? sep : '') + plugin.formatDate(
                                                altFormat, inst.selectedDates[i], inst.getConfig());
                                }
                                if (!inst.inline && !keyUp) {
                                        $(elem).val(value);
                                }
                                $(inst.options.altField).val(altValue);
                                if ($.isFunction(inst.options.onSelect) && !keyUp && !inst.inSelect) {
                                        inst.inSelect = true; // Prevent endless loops
                                        inst.options.onSelect.apply(elem, [inst.selectedDates]);
                                        inst.inSelect = false;
                                }
                        }
                },

                /** Retrieve the size of left and top borders for an element.
                        @private
                        @param elem {jQuery} The element of interest.
                        @return {number[]} The left and top borders. */
                _getBorders: function(elem) {
                        var convert = function(value) {
                                return {thin: 1, medium: 3, thick: 5}[value] || value;
                        };
                        return [parseFloat(convert(elem.css('border-left-width'))),
                                parseFloat(convert(elem.css('border-top-width')))];
                },

                /** Check positioning to remain on the screen.
                        @private
                        @param inst {object} The current instance settings.
                        @return {object} The updated offset for the datepicker. */
                _checkOffset: function(inst) {
                        var base = (inst.elem.is(':hidden') && inst.trigger ? inst.trigger : inst.elem);
                        var offset = base.offset();
                        var browserWidth = $(window).width();
                        var browserHeight = $(window).height();
                        if (browserWidth === 0) {
                                return offset;
                        }
                        var isFixed = false;
                        $(inst.elem).parents().each(function() {
                                isFixed |= $(this).css('position') === 'fixed';
                                return !isFixed;
                        });
                        var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
                        var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
                        var above = offset.top - (isFixed ? scrollY : 0) - inst.div.outerHeight();
                        var below = offset.top - (isFixed ? scrollY : 0) + base.outerHeight();
                        var alignL = offset.left - (isFixed ? scrollX : 0);
                        var alignR = offset.left - (isFixed ? scrollX : 0) + base.outerWidth() - inst.div.outerWidth();
                        var tooWide = (offset.left - scrollX + inst.div.outerWidth()) > browserWidth;
                        var tooHigh = (offset.top - scrollY + inst.elem.outerHeight() +
                                inst.div.outerHeight()) > browserHeight;
                        inst.div.css('position', isFixed ? 'fixed' : 'absolute');
                        var alignment = inst.options.alignment;
                        if (alignment === 'topLeft') {
                                offset = {left: alignL, top: above};
                        }
                        else if (alignment === 'topRight') {
                                offset = {left: alignR, top: above};
                        }
                        else if (alignment === 'bottomLeft') {
                                offset = {left: alignL, top: below};
                        }
                        else if (alignment === 'bottomRight') {
                                offset = {left: alignR, top: below};
                        }
                        else if (alignment === 'top') {
                                offset = {left: (inst.options.isRTL || tooWide ? alignR : alignL), top: above};
                        }
                        else { // bottom
                                offset = {left: (inst.options.isRTL || tooWide ? alignR : alignL),
                                        top: (tooHigh ? above : below)};
                        }
                        offset.left = Math.max((isFixed ? 0 : scrollX), offset.left);
                        offset.top = Math.max((isFixed ? 0 : scrollY), offset.top);
                        return offset;
                },

                /** Close date picker if clicked elsewhere.
                        @private
                        @param event {MouseEvent} The mouse click to check. */
                _checkExternalClick: function(event) {
                        if (!plugin.curInst) {
                                return;
                        }
                        var elem = $(event.target);
                        if (elem.closest('.' + plugin._popupClass + ',.' + plugin._triggerClass).length === 0 &&
                                        !elem.hasClass(plugin._getMarker())) {
                                plugin.hide(plugin.curInst);
                        }
                },

                /** Hide a popup datepicker.
                        @param elem {Element|object} The control to use or the current instance settings.
                        @param immediate {boolean} <code>true</code> to close immediately without animation (internal).
                        @example $(selector).datepick('hide') */
                hide: function(elem, immediate) {
                        if (!elem) {
                                return;
                        }
                        var inst = this._getInst(elem);
                        if ($.isEmptyObject(inst)) {
                                inst = elem;
                        }
                        if (inst && inst === plugin.curInst) {
                                var showAnim = (immediate ? '' : inst.options.showAnim);
                                var showSpeed = inst.options.showSpeed;
                                showSpeed = (showSpeed === 'normal' && $.ui &&
                                        parseInt($.ui.version.substring(2)) >= 8 ? '_default' : showSpeed);
                                var postProcess = function() {
                                        if (!inst.div) {
                                                return;
                                        }
                                        inst.div.remove();
                                        inst.div = null;
                                        plugin.curInst = null;
                                        if ($.isFunction(inst.options.onClose)) {
                                                inst.options.onClose.apply(elem, [inst.selectedDates]);
                                        }
                                };
                                inst.div.stop();
                                if ($.effects && ($.effects[showAnim] || ($.effects.effect && $.effects.effect[showAnim]))) {
                                        inst.div.hide(showAnim, inst.options.showOptions, showSpeed, postProcess);
                                }
                                else {
                                        var hideAnim = (showAnim === 'slideDown' ? 'slideUp' :
                                                (showAnim === 'fadeIn' ? 'fadeOut' : 'hide'));
                                        inst.div[hideAnim]((showAnim ? showSpeed : ''), postProcess);
                                }
                                if (!showAnim) {
                                        postProcess();
                                }
                        }
                },

                /** Handle keystrokes in the datepicker.
                        @private
                        @param event {KeyEvent} The keystroke.
                        @return {boolean} <code>true</code> if not handled, <code>false</code> if handled. */
                _keyDown: function(event) {
                        var elem = event.target;
                        var inst = plugin._getInst(elem);
                        var handled = false;
                        if (inst.div) {
                                if (event.keyCode === 9) { // Tab - close
                                        plugin.hide(elem);
                                }
                                else if (event.keyCode === 13) { // Enter - select
                                        plugin.selectDate(elem,
                                                $('a.' + inst.options.renderer.highlightedClass, inst.div)[0]);
                                        handled = true;
                                }
                                else { // Command keystrokes
                                        var commands = inst.options.commands;
                                        for (var name in commands) {
                                                var command = commands[name];
                                                if (command.keystroke.keyCode === event.keyCode &&
                                                                !!command.keystroke.ctrlKey === !!(event.ctrlKey || event.metaKey) &&
                                                                !!command.keystroke.altKey === event.altKey &&
                                                                !!command.keystroke.shiftKey === event.shiftKey) {
                                                        plugin.performAction(elem, name);
                                                        handled = true;
                                                        break;
                                                }
                                        }
                                }
                        }
                        else { // Show on 'current' keystroke
                                var command = inst.options.commands.current;
                                if (command.keystroke.keyCode === event.keyCode &&
                                                !!command.keystroke.ctrlKey === !!(event.ctrlKey || event.metaKey) &&
                                                !!command.keystroke.altKey === event.altKey &&
                                                !!command.keystroke.shiftKey === event.shiftKey) {
                                        plugin.show(elem);
                                        handled = true;
                                }
                        }
                        inst.ctrlKey = ((event.keyCode < 48 && event.keyCode !== 32) || event.ctrlKey || event.metaKey);
                        if (handled) {
                                event.preventDefault();
                                event.stopPropagation();
                        }
                        return !handled;
                },

                /** Filter keystrokes in the datepicker.
                        @private
                        @param event {KeyEvent} The keystroke.
                        @return {boolean} <code>true</code> if allowed, <code>false</code> if not allowed. */
                _keyPress: function(event) {
                        var inst = plugin._getInst(event.target);
                        if (!$.isEmptyObject(inst) && inst.options.constrainInput) {
                                var ch = String.fromCharCode(event.keyCode || event.charCode);
                                var allowedChars = plugin._allowedChars(inst);
                                return (event.metaKey || inst.ctrlKey || ch < ' ' ||
                                        !allowedChars || allowedChars.indexOf(ch) > -1);
                        }
                        return true;
                },

                /** Determine the set of characters allowed by the date format.
                        @private
                        @param inst {object} The current instance settings.
                        @return {string} The set of allowed characters, or <code>null</code> if anything allowed. */
                _allowedChars: function(inst) {
                        var allowedChars = (inst.options.multiSelect ? inst.options.multiSeparator :
                                (inst.options.rangeSelect ? inst.options.rangeSeparator : ''));
                        var literal = false;
                        var hasNum = false;
                        var dateFormat = inst.options.dateFormat;
                        for (var i = 0; i < dateFormat.length; i++) {
                                var ch = dateFormat.charAt(i);
                                if (literal) {
                                        if (ch === "'" && dateFormat.charAt(i + 1) !== "'") {
                                                literal = false;
                                        }
                                        else {
                                                allowedChars += ch;
                                        }
                                }
                                else {
                                        switch (ch) {
                                                case 'd': case 'm': case 'o': case 'w':
                                                        allowedChars += (hasNum ? '' : '0123456789'); hasNum = true; break;
                                                case 'y': case '@': case '!':
                                                        allowedChars += (hasNum ? '' : '0123456789') + '-'; hasNum = true; break;
                                                case 'J':
                                                        allowedChars += (hasNum ? '' : '0123456789') + '-.'; hasNum = true; break;
                                                case 'D': case 'M': case 'Y':
                                                        return null; // Accept anything
                                                case "'":
                                                        if (dateFormat.charAt(i + 1) === "'") {
                                                                allowedChars += "'";
                                                        }
                                                        else {
                                                                literal = true;
                                                        }
                                                        break;
                                                default:
                                                        allowedChars += ch;
                                        }
                                }
                        }
                        return allowedChars;
                },

                /** Synchronise datepicker with the field.
                        @private
                        @param event {KeyEvent} The keystroke.
                        @return {boolean} <code>true</code> if allowed, <code>false</code> if not allowed. */
                _keyUp: function(event) {
                        var elem = event.target;
                        var inst = plugin._getInst(elem);
                        if (!$.isEmptyObject(inst) && !inst.ctrlKey && inst.lastVal !== inst.elem.val()) {
                                try {
                                        var dates = plugin._extractDates(inst, inst.elem.val());
                                        if (dates.length > 0) {
                                                plugin.setDate(elem, dates, null, true);
                                        }
                                }
                                catch (event) {
                                        // Ignore
                                }
                        }
                        return true;
                },

                /** Increment/decrement month/year on mouse wheel activity.
                        @private
                        @param event {event} The mouse wheel event.
                        @param delta {number} The amount of change. */
                _doMouseWheel: function(event, delta) {
                        var elem = (plugin.curInst && plugin.curInst.elem[0]) ||
                                $(event.target).closest('.' + plugin._getMarker())[0];
                        if (plugin.isDisabled(elem)) {
                                return;
                        }
                        var inst = plugin._getInst(elem);
                        if (inst.options.useMouseWheel) {
                                delta = (delta < 0 ? -1 : +1);
                                plugin.changeMonth(elem, -inst.options[event.ctrlKey ? 'monthsToJump' : 'monthsToStep'] * delta);
                        }
                        event.preventDefault();
                },

                /** Clear an input and close a popup datepicker.
                        @param elem {Element} The control to use.
                        @example $(selector).datepick('clear') */
                clear: function(elem) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst)) {
                                inst.selectedDates = [];
                                this.hide(elem);
                                var defaultDate = inst.get('defaultDate');
                                if (inst.options.selectDefaultDate && defaultDate) {
                                        this.setDate(elem, plugin.newDate(defaultDate || plugin.today()));
                                }
                                else {
                                        this._updateInput(elem);
                                }
                        }
                },

                /** Retrieve the selected date(s) for a datepicker.
                        @param elem {Element} The control to examine.
                        @return {Date[]} The selected date(s).
                        @example var dates = $(selector).datepick('getDate') */
                getDate: function(elem) {
                        var inst = this._getInst(elem);
                        return (!$.isEmptyObject(inst) ? inst.selectedDates : []);
                },

                /** Set the selected date(s) for a datepicker.
                        @param elem {Element} the control to examine.
                        @param dates {Date|number|string|array} the selected date(s).
                        @param [endDate] {Date|number|string} the ending date for a range.
                        @param keyUp {boolean} <code>true</code> if coming from <code>keyUp</code> processing (internal).
                        @param setOpt {boolean} <code>true</code> if coming from option processing (internal).
                        @example $(selector).datepick('setDate', new Date(2014, 12-1, 25))
 $(selector).datepick('setDate', '12/25/2014', '01/01/2015')
 $(selector).datepick('setDate', [date1, date2, date3]) */
                setDate: function(elem, dates, endDate, keyUp, setOpt) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst)) {
                                if (!$.isArray(dates)) {
                                        dates = [dates];
                                        if (endDate) {
                                                dates.push(endDate);
                                        }
                                }
                                var minDate = inst.get('minDate');
                                var maxDate = inst.get('maxDate');
                                var curDate = inst.selectedDates[0];
                                inst.selectedDates = [];
                                for (var i = 0; i < dates.length; i++) {
                                        var date = plugin.determineDate(
                                                dates[i], null, curDate, inst.options.dateFormat, inst.getConfig());
                                        if (date) {
                                                if ((!minDate || date.getTime() >= minDate.getTime()) &&
                                                                (!maxDate || date.getTime() <= maxDate.getTime())) {
                                                        var found = false;
                                                        for (var j = 0; j < inst.selectedDates.length; j++) {
                                                                if (inst.selectedDates[j].getTime() === date.getTime()) {
                                                                        found = true;
                                                                        break;
                                                                }
                                                        }
                                                        if (!found) {
                                                                inst.selectedDates.push(date);
                                                        }
                                                }
                                        }
                                }
                                inst.selectedDates.splice(inst.options.multiSelect ||
                                        (inst.options.rangeSelect ? 2 : 1), inst.selectedDates.length);
                                if (inst.options.rangeSelect) {
                                        switch (inst.selectedDates.length) {
                                                case 1: inst.selectedDates[1] = inst.selectedDates[0]; break;
                                                case 2: inst.selectedDates[1] =
                                                        (inst.selectedDates[0].getTime() > inst.selectedDates[1].getTime() ?
                                                        inst.selectedDates[0] : inst.selectedDates[1]); break;
                                        }
                                        inst.pickingRange = false;
                                }
                                inst.prevDate = (inst.drawDate ? plugin.newDate(inst.drawDate) : null);
                                inst.drawDate = this._checkMinMax(plugin.newDate(inst.selectedDates[0] ||
                                        inst.get('defaultDate') || plugin.today()), inst);
                                if (!setOpt) {
                                        this._update(elem);
                                        this._updateInput(elem, keyUp);
                                }
                        }
                },

                /** Determine whether a date is selectable for this datepicker.
                        @private
                        @param elem {Element} The control to check.
                        @param date {Date|string|number} The date to check.
                        @return {boolean} <code>true</code> if selectable, <code>false</code> if not.
                        @example var selectable = $(selector).datepick('isSelectable', date) */
                isSelectable: function(elem, date) {
                        var inst = this._getInst(elem);
                        if ($.isEmptyObject(inst)) {
                                return false;
                        }
                        date = plugin.determineDate(date, inst.selectedDates[0] || this.today(), null,
                                inst.options.dateFormat, inst.getConfig());
                        return this._isSelectable(elem, date, inst.options.onDate,
                                inst.get('minDate'), inst.get('maxDate'));
                },

                /** Internally determine whether a date is selectable for this datepicker.
                        @private
                        @param elem {Element} the control to check.
                        @param date {Date} The date to check.
                        @param onDate {function|boolean} Any onDate callback or callback.selectable.
                        @param minDate {Date} The minimum allowed date.
                        @param maxDate {Date} The maximum allowed date.
                        @return {boolean} <code>true</code> if selectable, <code>false</code> if not. */
                _isSelectable: function(elem, date, onDate, minDate, maxDate) {
                        var dateInfo = (typeof onDate === 'boolean' ? {selectable: onDate} :
                                (!$.isFunction(onDate) ? {} : onDate.apply(elem, [date, true])));
                        return (dateInfo.selectable !== false) &&
                                (!minDate || date.getTime() >= minDate.getTime()) &&
                                (!maxDate || date.getTime() <= maxDate.getTime());
                },

                /** Perform a named action for a datepicker.
                        @param elem {element} The control to affect.
                        @param action {string} The name of the action. */
                performAction: function(elem, action) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst) && !this.isDisabled(elem)) {
                                var commands = inst.options.commands;
                                if (commands[action] && commands[action].enabled.apply(elem, [inst])) {
                                        commands[action].action.apply(elem, [inst]);
                                }
                        }
                },

                /** Set the currently shown month, defaulting to today's.
                        @param elem {Element} The control to affect.
                        @param [year] {number} The year to show.
                        @param [month] {number} The month to show (1-12).
                        @param [day] {number} The day to show.
                        @example $(selector).datepick('showMonth', 2014, 12, 25) */
                showMonth: function(elem, year, month, day) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst) && (day != null ||
                                        (inst.drawDate.getFullYear() !== year || inst.drawDate.getMonth() + 1 !== month))) {
                                inst.prevDate = plugin.newDate(inst.drawDate);
                                var show = this._checkMinMax((year != null ?
                                        plugin.newDate(year, month, 1) : plugin.today()), inst);
                                inst.drawDate = plugin.newDate(show.getFullYear(), show.getMonth() + 1, 
                                        (day != null ? day : Math.min(inst.drawDate.getDate(),
                                        plugin.daysInMonth(show.getFullYear(), show.getMonth() + 1))));
                                this._update(elem);
                        }
                },

                /** Adjust the currently shown month.
                        @param elem {Element} The control to affect.
                        @param offset {number} The number of months to change by.
                        @example $(selector).datepick('changeMonth', 2)*/
                changeMonth: function(elem, offset) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst)) {
                                var date = plugin.add(plugin.newDate(inst.drawDate), offset, 'm');
                                this.showMonth(elem, date.getFullYear(), date.getMonth() + 1);
                        }
                },

                /** Adjust the currently shown day.
                        @param elem {Element} The control to affect.
                        @param offset {number} The number of days to change by.
                        @example $(selector).datepick('changeDay', 7)*/
                changeDay: function(elem, offset) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst)) {
                                var date = plugin.add(plugin.newDate(inst.drawDate), offset, 'd');
                                this.showMonth(elem, date.getFullYear(), date.getMonth() + 1, date.getDate());
                        }
                },

                /** Restrict a date to the minimum/maximum specified.
                        @private
                        @param date {Date} The date to check.
                        @param inst {object} The current instance settings. */
                _checkMinMax: function(date, inst) {
                        var minDate = inst.get('minDate');
                        var maxDate = inst.get('maxDate');
                        date = (minDate && date.getTime() < minDate.getTime() ? plugin.newDate(minDate) : date);
                        date = (maxDate && date.getTime() > maxDate.getTime() ? plugin.newDate(maxDate) : date);
                        return date;
                },

                /** Retrieve the date associated with an entry in the datepicker.
                        @param elem {Element} The control to examine.
                        @param target {Element} The selected datepicker element.
                        @return {Date} The corresponding date, or <code>null</code>.                    
                        @example var date = $(selector).datepick('retrieveDate', $('div.datepick-popup a:contains(10)')[0]) */
                retrieveDate: function(elem, target) {
                        var inst = this._getInst(elem);
                        return ($.isEmptyObject(inst) ? null : this._normaliseDate(
                                new Date(parseInt(target.className.replace(/^.*dp(-?\d+).*$/, '$1'), 10))));
                },

                /** Select a date for this datepicker.
                        @param elem {Element} The control to examine.
                        @param target {Element} The selected datepicker element.
                        @example $(selector).datepick('selectDate', $('div.datepick-popup a:contains(10)')[0]) */
                selectDate: function(elem, target) {
                        var inst = this._getInst(elem);
                        if (!$.isEmptyObject(inst) && !this.isDisabled(elem)) {
                                var date = this.retrieveDate(elem, target);
                                if (inst.options.multiSelect) {
                                        var found = false;
                                        for (var i = 0; i < inst.selectedDates.length; i++) {
                                                if (date.getTime() === inst.selectedDates[i].getTime()) {
                                                        inst.selectedDates.splice(i, 1);
                                                        found = true;
                                                        break;
                                                }
                                        }
                                        if (!found && inst.selectedDates.length < inst.options.multiSelect) {
                                                inst.selectedDates.push(date);
                                        }
                                }
                                else if (inst.options.rangeSelect) {
                                        if (inst.pickingRange) {
                                                inst.selectedDates[1] = date;
                                        }
                                        else {
                                                inst.selectedDates = [date, date];
                                        }
                                        inst.pickingRange = !inst.pickingRange;
                                }
                                else {
                                        inst.selectedDates = [date];
                                }
                                inst.prevDate = plugin.newDate(date);
                                this._updateInput(elem);
                                if (inst.inline || inst.pickingRange || inst.selectedDates.length <
                                                (inst.options.multiSelect || (inst.options.rangeSelect ? 2 : 1))) {
                                        this._update(elem);
                                }
                                else {
                                        this.hide(elem);
                                }
                        }
                },

                /** Generate the datepicker content for this control.
                        @private
                        @param elem {Element} The control to affect.
                        @param inst {object} The current instance settings.
                        @return {jQuery} The datepicker content */
                _generateContent: function(elem, inst) {
                        var monthsToShow = inst.options.monthsToShow;
                        monthsToShow = ($.isArray(monthsToShow) ? monthsToShow : [1, monthsToShow]);
                        inst.drawDate = this._checkMinMax(
                                inst.drawDate || inst.get('defaultDate') || plugin.today(), inst);
                        var drawDate = plugin._applyMonthsOffset(plugin.newDate(inst.drawDate), inst);
                        // Generate months
                        var monthRows = '';
                        for (var row = 0; row < monthsToShow[0]; row++) {
                                var months = '';
                                for (var col = 0; col < monthsToShow[1]; col++) {
                                        months += this._generateMonth(elem, inst, drawDate.getFullYear(),
                                                drawDate.getMonth() + 1, inst.options.renderer, (row === 0 && col === 0));
                                        plugin.add(drawDate, 1, 'm');
                                }
                                monthRows += this._prepare(inst.options.renderer.monthRow, inst).replace(/\{months\}/, months);
                        }
                        var picker = this._prepare(inst.options.renderer.picker, inst).replace(/\{months\}/, monthRows).
                                replace(/\{weekHeader\}/g, this._generateDayHeaders(inst, inst.options.renderer));
                        // Add commands
                        var addCommand = function(type, open, close, name, classes) {
                                if (picker.indexOf('{' + type + ':' + name + '}') === -1) {
                                        return;
                                }
                                var command = inst.options.commands[name];
                                var date = (inst.options.commandsAsDateFormat ? command.date.apply(elem, [inst]) : null);
                                picker = picker.replace(new RegExp('\\{' + type + ':' + name + '\\}', 'g'),
                                        '<' + open + (command.status ? ' title="' + inst.options[command.status] + '"' : '') +
                                        ' class="' + inst.options.renderer.commandClass + ' ' +
                                        inst.options.renderer.commandClass + '-' + name + ' ' + classes +
                                        (command.enabled(inst) ? '' : ' ' + inst.options.renderer.disabledClass) + '">' +
                                        (date ? plugin.formatDate(inst.options[command.text], date, inst.getConfig()) :
                                        inst.options[command.text]) + '</' + close + '>');
                        };
                        for (var name in inst.options.commands) {
                                addCommand('button', 'button type="button"', 'button', name,
                                        inst.options.renderer.commandButtonClass);
                                addCommand('link', 'a href="javascript:void(0)"', 'a', name,
                                        inst.options.renderer.commandLinkClass);
                        }
                        picker = $(picker);
                        if (monthsToShow[1] > 1) {
                                var count = 0;
                                $(inst.options.renderer.monthSelector, picker).each(function() {
                                        var nth = ++count % monthsToShow[1];
                                        $(this).addClass(nth === 1 ? 'first' : (nth === 0 ? 'last' : ''));
                                });
                        }
                        // Add datepicker behaviour
                        var self = this;
                        picker.find(inst.options.renderer.daySelector + ' a').hover(
                                        function() { $(this).addClass(inst.options.renderer.highlightedClass); },
                                        function() {
                                                (inst.inline ? $(this).closest('.' + self._getMarker()) : inst.div).
                                                        find(inst.options.renderer.daySelector + ' a').
                                                        removeClass(inst.options.renderer.highlightedClass);
                                        }).
                                click(function() {
                                        self.selectDate(elem, this);
                                }).end().
                                find('select.' + this._monthYearClass + ':not(.' + this._anyYearClass + ')').
                                change(function() {
                                        var monthYear = $(this).val().split('/');
                                        self.showMonth(elem, parseInt(monthYear[1], 10), parseInt(monthYear[0], 10));
                                }).end().
                                find('select.' + this._anyYearClass).click(function() {
                                        $(this).css('visibility', 'hidden').
                                                next('input').css({left: this.offsetLeft, top: this.offsetTop,
                                                width: this.offsetWidth, height: this.offsetHeight}).show().focus();
                                }).end().
                                find('input.' + self._monthYearClass).change(function() {
                                        try {
                                                var year = parseInt($(this).val(), 10);
                                                year = (isNaN(year) ? inst.drawDate.getFullYear() : year);
                                                self.showMonth(elem, year, inst.drawDate.getMonth() + 1, inst.drawDate.getDate());
                                        }
                                        catch (e) {
                                                alert(e);
                                        }
                                }).keydown(function(event) {
                                        if (event.keyCode === 13) { // Enter
                                                $(event.elem).change();
                                        }
                                        else if (event.keyCode === 27) { // Escape
                                                $(event.elem).hide().prev('select').css('visibility', 'visible');
                                                inst.elem.focus();
                                        }
                                });
                        // Add command behaviour
                        picker.find('.' + inst.options.renderer.commandClass).click(function() {
                                        if (!$(this).hasClass(inst.options.renderer.disabledClass)) {
                                                var action = this.className.replace(
                                                        new RegExp('^.*' + inst.options.renderer.commandClass + '-([^ ]+).*$'), '$1');
                                                plugin.performAction(elem, action);
                                        }
                                });
                        // Add classes
                        if (inst.options.isRTL) {
                                picker.addClass(inst.options.renderer.rtlClass);
                        }
                        if (monthsToShow[0] * monthsToShow[1] > 1) {
                                picker.addClass(inst.options.renderer.multiClass);
                        }
                        if (inst.options.pickerClass) {
                                picker.addClass(inst.options.pickerClass);
                        }
                        // Resize
                        $('body').append(picker);
                        var width = 0;
                        picker.find(inst.options.renderer.monthSelector).each(function() {
                                width += $(this).outerWidth();
                        });
                        picker.width(width / monthsToShow[0]);
                        // Pre-show customisation
                        if ($.isFunction(inst.options.onShow)) {
                                inst.options.onShow.apply(elem, [picker, inst]);
                        }
                        return picker;
                },

                /** Generate the content for a single month.
                        @private
                        @param elem {Element} The control to affect.
                        @param inst {object} The current instance settings.
                        @param year {number} The year to generate.
                        @param month {number} The month to generate.
                        @param renderer {object} The rendering templates.
                        @param first {boolean} <code>true</code> if first of multiple months.
                        @return {string} The month content. */
                _generateMonth: function(elem, inst, year, month, renderer, first) {
                        var daysInMonth = plugin.daysInMonth(year, month);
                        var monthsToShow = inst.options.monthsToShow;
                        monthsToShow = ($.isArray(monthsToShow) ? monthsToShow : [1, monthsToShow]);
                        var fixedWeeks = inst.options.fixedWeeks || (monthsToShow[0] * monthsToShow[1] > 1);
                        var firstDay = inst.options.firstDay;
                        var leadDays = (plugin.newDate(year, month, 1).getDay() - firstDay + 7) % 7;
                        var numWeeks = (fixedWeeks ? 6 : Math.ceil((leadDays + daysInMonth) / 7));
                        var selectOtherMonths = inst.options.selectOtherMonths && inst.options.showOtherMonths;
                        var minDate = (inst.pickingRange ? inst.selectedDates[0] : inst.get('minDate'));
                        var maxDate = inst.get('maxDate');
                        var showWeeks = renderer.week.indexOf('{weekOfYear}') > -1;
                        var today = plugin.today();
                        var drawDate = plugin.newDate(year, month, 1);
                        plugin.add(drawDate, -leadDays - (fixedWeeks && (drawDate.getDay() === firstDay) ? 7 : 0), 'd');
                        var ts = drawDate.getTime();
                        // Generate weeks
                        var weeks = '';
                        for (var week = 0; week < numWeeks; week++) {
                                var weekOfYear = (!showWeeks ? '' : '<span class="dp' + ts + '">' +
                                        ($.isFunction(inst.options.calculateWeek) ? inst.options.calculateWeek(drawDate) : 0) + '</span>');
                                var days = '';
                                for (var day = 0; day < 7; day++) {
                                        var selected = false;
                                        if (inst.options.rangeSelect && inst.selectedDates.length > 0) {
                                                selected = (drawDate.getTime() >= inst.selectedDates[0] &&
                                                        drawDate.getTime() <= inst.selectedDates[1]);
                                        }
                                        else {
                                                for (var i = 0; i < inst.selectedDates.length; i++) {
                                                        if (inst.selectedDates[i].getTime() === drawDate.getTime()) {
                                                                selected = true;
                                                                break;
                                                        }
                                                }
                                        }
                                        var dateInfo = (!$.isFunction(inst.options.onDate) ? {} :
                                                inst.options.onDate.apply(elem, [drawDate, drawDate.getMonth() + 1 === month]));
                                        var selectable = (selectOtherMonths || drawDate.getMonth() + 1 === month) &&
                                                this._isSelectable(elem, drawDate, dateInfo.selectable, minDate, maxDate);
                                        days += this._prepare(renderer.day, inst).replace(/\{day\}/g,
                                                (selectable ? '<a href="javascript:void(0)"' : '<span') +
                                                ' class="dp' + ts + ' ' + (dateInfo.dateClass || '') +
                                                (selected && (selectOtherMonths || drawDate.getMonth() + 1 === month) ?
                                                ' ' + renderer.selectedClass : '') +
                                                (selectable ? ' ' + renderer.defaultClass : '') +
                                                ((drawDate.getDay() || 7) < 6 ? '' : ' ' + renderer.weekendClass) +
                                                (drawDate.getMonth() + 1 === month ? '' : ' ' + renderer.otherMonthClass) +
                                                (drawDate.getTime() === today.getTime() && (drawDate.getMonth() + 1) === month ?
                                                ' ' + renderer.todayClass : '') +
                                                (drawDate.getTime() === inst.drawDate.getTime() && (drawDate.getMonth() + 1) === month ?
                                                ' ' + renderer.highlightedClass : '') + '"' +
                                                (dateInfo.title || (inst.options.dayStatus && selectable) ? ' title="' +
                                                (dateInfo.title || plugin.formatDate(
                                                inst.options.dayStatus, drawDate, inst.getConfig())) + '"' : '') + '>' +
                                                (inst.options.showOtherMonths || (drawDate.getMonth() + 1) === month ?
                                                dateInfo.content || drawDate.getDate() : '&nbsp;') +
                                                (selectable ? '</a>' : '</span>'));
                                        plugin.add(drawDate, 1, 'd');
                                        ts = drawDate.getTime();
                                }
                                weeks += this._prepare(renderer.week, inst).replace(/\{days\}/g, days).
                                        replace(/\{weekOfYear\}/g, weekOfYear);
                        }
                        var monthHeader = this._prepare(renderer.month, inst).match(/\{monthHeader(:[^\}]+)?\}/);
                        monthHeader = (monthHeader[0].length <= 13 ? 'MM yyyy' :
                                monthHeader[0].substring(13, monthHeader[0].length - 1));
                        monthHeader = (first ? this._generateMonthSelection(
                                inst, year, month, minDate, maxDate, monthHeader, renderer) :
                                plugin.formatDate(monthHeader, plugin.newDate(year, month, 1), inst.getConfig()));
                        var weekHeader = this._prepare(renderer.weekHeader, inst).
                                replace(/\{days\}/g, this._generateDayHeaders(inst, renderer));
                        return this._prepare(renderer.month, inst).replace(/\{monthHeader(:[^\}]+)?\}/g, monthHeader).
                                replace(/\{weekHeader\}/g, weekHeader).replace(/\{weeks\}/g, weeks);
                },

                /** Generate the HTML for the day headers.
                        @private
                        @param inst {object} The current instance settings.
                        @param renderer {object} The rendering templates.
                        @return {string} A week's worth of day headers. */
                _generateDayHeaders: function(inst, renderer) {
                        var header = '';
                        for (var day = 0; day < 7; day++) {
                                var dow = (day + inst.options.firstDay) % 7;
                                header += this._prepare(renderer.dayHeader, inst).replace(/\{day\}/g,
                                        '<span class="' + this._curDoWClass + dow + '" title="' +
                                        inst.options.dayNames[dow] + '">' + inst.options.dayNamesMin[dow] + '</span>');
                        }
                        return header;
                },

                /** Generate selection controls for month.
                        @private
                        @param inst {object} The current instance settings.
                        @param year {number} The year to generate.
                        @param month {number} The month to generate.
                        @param minDate {Date} The minimum date allowed.
                        @param maxDate {Date} The maximum date allowed.
                        @param monthHeader {string} The month/year format.
                        @return {string} The month selection content. */
                _generateMonthSelection: function(inst, year, month, minDate, maxDate, monthHeader) {
                        if (!inst.options.changeMonth) {
                                return plugin.formatDate(
                                        monthHeader, plugin.newDate(year, month, 1), inst.getConfig());
                        }
                        // Months
                        var monthNames = inst.options['monthNames' + (monthHeader.match(/mm/i) ? '' : 'Short')];
                        var html = monthHeader.replace(/m+/i, '\\x2E').replace(/y+/i, '\\x2F');
                        var selector = '<select class="' + this._monthYearClass +
                                '" title="' + inst.options.monthStatus + '">';
                        for (var m = 1; m <= 12; m++) {
                                if ((!minDate || plugin.newDate(year, m, plugin.daysInMonth(year, m)).
                                                getTime() >= minDate.getTime()) &&
                                                (!maxDate || plugin.newDate(year, m, 1).getTime() <= maxDate.getTime())) {
                                        selector += '<option value="' + m + '/' + year + '"' +
                                                (month === m ? ' selected="selected"' : '') + '>' +
                                                monthNames[m - 1] + '</option>';
                                }
                        }
                        selector += '</select>';
                        html = html.replace(/\\x2E/, selector);
                        // Years
                        var yearRange = inst.options.yearRange;
                        if (yearRange === 'any') {
                                selector = '<select class="' + this._monthYearClass + ' ' + this._anyYearClass +
                                        '" title="' + inst.options.yearStatus + '">' +
                                        '<option>' + year + '</option></select>' +
                                        '<input class="' + this._monthYearClass + ' ' + this._curMonthClass +
                                        month + '" value="' + year + '">';
                        }
                        else {
                                yearRange = yearRange.split(':');
                                var todayYear = plugin.today().getFullYear();
                                var start = (yearRange[0].match('c[+-].*') ? year + parseInt(yearRange[0].substring(1), 10) :
                                        ((yearRange[0].match('[+-].*') ? todayYear : 0) + parseInt(yearRange[0], 10)));
                                var end = (yearRange[1].match('c[+-].*') ? year + parseInt(yearRange[1].substring(1), 10) :
                                        ((yearRange[1].match('[+-].*') ? todayYear : 0) + parseInt(yearRange[1], 10)));
                                selector = '<select class="' + this._monthYearClass +
                                        '" title="' + inst.options.yearStatus + '">';
                                start = plugin.add(plugin.newDate(start + 1, 1, 1), -1, 'd');
                                end = plugin.newDate(end, 1, 1);
                                var addYear = function(y) {
                                        if (y !== 0) {
                                                selector += '<option value="' + month + '/' + y + '"' +
                                                        (year === y ? ' selected="selected"' : '') + '>' + y + '</option>';
                                        }
                                };
                                if (start.getTime() < end.getTime()) {
                                        start = (minDate && minDate.getTime() > start.getTime() ? minDate : start).getFullYear();
                                        end = (maxDate && maxDate.getTime() < end.getTime() ? maxDate : end).getFullYear();
                                        for (var y = start; y <= end; y++) {
                                                addYear(y);
                                        }
                                }
                                else {
                                        start = (maxDate && maxDate.getTime() < start.getTime() ? maxDate : start).getFullYear();
                                        end = (minDate && minDate.getTime() > end.getTime() ? minDate : end).getFullYear();
                                        for (var y = start; y >= end; y--) {
                                                addYear(y);
                                        }
                                }
                                selector += '</select>';
                        }
                        html = html.replace(/\\x2F/, selector);
                        return html;
                },

                /** Prepare a render template for use.
                        Exclude popup/inline sections that are not applicable.
                        Localise text of the form: {l10n:name}.
                        @private
                        @param text {string} The text to localise.
                        @param inst {object} The current instance settings.
                        @return {string} The localised text. */
                _prepare: function(text, inst) {
                        var replaceSection = function(type, retain) {
                                while (true) {
                                        var start = text.indexOf('{' + type + ':start}');
                                        if (start === -1) {
                                                return;
                                        }
                                        var end = text.substring(start).indexOf('{' + type + ':end}');
                                        if (end > -1) {
                                                text = text.substring(0, start) +
                                                        (retain ? text.substr(start + type.length + 8, end - type.length - 8) : '') +
                                                        text.substring(start + end + type.length + 6);
                                        }
                                }
                        };
                        replaceSection('inline', inst.inline);
                        replaceSection('popup', !inst.inline);
                        var pattern = /\{l10n:([^\}]+)\}/;
                        var matches = null;
                        while (matches = pattern.exec(text)) {
                                text = text.replace(matches[0], inst.options[matches[1]]);
                        }
                        return text;
                }
        });

        var plugin = $.datepick; // Singleton instance

        $(function() {
                $(document).on('mousedown.' + pluginName, plugin._checkExternalClick).
                        on('resize.' + pluginName, function() { plugin.hide(plugin.curInst); });
        });

})(jQuery);