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/*!
 * Sizzle CSS Selector Engine v2.2.0-pre
 * http://sizzlejs.com/
 *
 * Copyright 2008, 2014 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-12-16
 */
(function( window ) {

var i,
        support,
        Expr,
        getText,
        isXML,
        tokenize,
        compile,
        select,
        outermostContext,
        sortInput,
        hasDuplicate,

        // Local document vars
        setDocument,
        document,
        docElem,
        documentIsHTML,
        rbuggyQSA,
        rbuggyMatches,
        matches,
        contains,

        // Instance-specific data
        expando = "sizzle" + 1 * new Date(),
        preferredDoc = window.document,
        dirruns = 0,
        done = 0,
        classCache = createCache(),
        tokenCache = createCache(),
        compilerCache = createCache(),
        sortOrder = function( a, b ) {
                if ( a === b ) {
                        hasDuplicate = true;
                }
                return 0;
        },

        // General-purpose constants
        MAX_NEGATIVE = 1 << 31,

        // Instance methods
        hasOwn = ({}).hasOwnProperty,
        arr = [],
        pop = arr.pop,
        push_native = arr.push,
        push = arr.push,
        slice = arr.slice,
        // Use a stripped-down indexOf as it's faster than native
        // http://jsperf.com/thor-indexof-vs-for/5
        indexOf = function( list, elem ) {
                var i = 0,
                        len = list.length;
                for ( ; i < len; i++ ) {
                        if ( list[i] === elem ) {
                                return i;
                        }
                }
                return -1;
        },

        booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",

        // Regular expressions

        // Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
        whitespace = "[\\x20\\t\\r\\n\\f]",
        // http://www.w3.org/TR/css3-syntax/#characters
        characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",

        // Loosely modeled on CSS identifier characters
        // An unquoted value should be a CSS identifier http://www.w3.org/TR/css3-selectors/#attribute-selectors
        // Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
        identifier = characterEncoding.replace( "w", "w#" ),

        // Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
        attributes = "\\[" + whitespace + "*(" + characterEncoding + ")(?:" + whitespace +
                // Operator (capture 2)
                "*([*^$|!~]?=)" + whitespace +
                // "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
                "*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
                "*\\]",

        pseudos = ":(" + characterEncoding + ")(?:\\((" +
                // To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
                // 1. quoted (capture 3; capture 4 or capture 5)
                "('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
                // 2. simple (capture 6)
                "((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
                // 3. anything else (capture 2)
                ".*" +
                ")\\)|)",

        // Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
        rwhitespace = new RegExp( whitespace + "+", "g" ),
        rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),

        rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
        rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),

        rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),

        rpseudo = new RegExp( pseudos ),
        ridentifier = new RegExp( "^" + identifier + "$" ),

        matchExpr = {
                "ID": new RegExp( "^#(" + characterEncoding + ")" ),
                "CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
                "TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
                "ATTR": new RegExp( "^" + attributes ),
                "PSEUDO": new RegExp( "^" + pseudos ),
                "CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
                        "*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
                        "*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
                "bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
                // For use in libraries implementing .is()
                // We use this for POS matching in `select`
                "needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
                        whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
        },

        rinputs = /^(?:input|select|textarea|button)$/i,
        rheader = /^h\d$/i,

        rnative = /^[^{]+\{\s*\[native \w/,

        // Easily-parseable/retrievable ID or TAG or CLASS selectors
        rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,

        rsibling = /[+~]/,
        rescape = /'|\\/g,

        // CSS escapes http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
        runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
        funescape = function( _, escaped, escapedWhitespace ) {
                var high = "0x" + escaped - 0x10000;
                // NaN means non-codepoint
                // Support: Firefox<24
                // Workaround erroneous numeric interpretation of +"0x"
                return high !== high || escapedWhitespace ?
                        escaped :
                        high < 0 ?
                                // BMP codepoint
                                String.fromCharCode( high + 0x10000 ) :
                                // Supplemental Plane codepoint (surrogate pair)
                                String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
        },

        // Used for iframes
        // See setDocument()
        // Removing the function wrapper causes a "Permission Denied"
        // error in IE
        unloadHandler = function() {
                setDocument();
        };

// Optimize for push.apply( _, NodeList )
try {
        push.apply(
                (arr = slice.call( preferredDoc.childNodes )),
                preferredDoc.childNodes
        );
        // Support: Android<4.0
        // Detect silently failing push.apply
        arr[ preferredDoc.childNodes.length ].nodeType;
} catch ( e ) {
        push = { apply: arr.length ?

                // Leverage slice if possible
                function( target, els ) {
                        push_native.apply( target, slice.call(els) );
                } :

                // Support: IE<9
                // Otherwise append directly
                function( target, els ) {
                        var j = target.length,
                                i = 0;
                        // Can't trust NodeList.length
                        while ( (target[j++] = els[i++]) ) {}
                        target.length = j - 1;
                }
        };
}

function Sizzle( selector, context, results, seed ) {
        var match, elem, m, nodeType,
                // QSA vars
                i, groups, old, nid, newContext, newSelector;

        if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
                setDocument( context );
        }

        context = context || document;
        results = results || [];
        nodeType = context.nodeType;

        if ( typeof selector !== "string" || !selector ||
                nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {

                return results;
        }

        if ( !seed && documentIsHTML ) {

                // Try to shortcut find operations when possible (e.g., not under DocumentFragment)
                if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
                        // Speed-up: Sizzle("#ID")
                        if ( (m = match[1]) ) {
                                if ( nodeType === 9 ) {
                                        elem = context.getElementById( m );
                                        // Check parentNode to catch when Blackberry 4.6 returns
                                        // nodes that are no longer in the document (jQuery #6963)
                                        if ( elem && elem.parentNode ) {
                                                // Handle the case where IE, Opera, and Webkit return items
                                                // by name instead of ID
                                                if ( elem.id === m ) {
                                                        results.push( elem );
                                                        return results;
                                                }
                                        } else {
                                                return results;
                                        }
                                } else {
                                        // Context is not a document
                                        if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
                                                contains( context, elem ) && elem.id === m ) {
                                                results.push( elem );
                                                return results;
                                        }
                                }

                        // Speed-up: Sizzle("TAG")
                        } else if ( match[2] ) {
                                push.apply( results, context.getElementsByTagName( selector ) );
                                return results;

                        // Speed-up: Sizzle(".CLASS")
                        } else if ( (m = match[3]) && support.getElementsByClassName ) {
                                push.apply( results, context.getElementsByClassName( m ) );
                                return results;
                        }
                }

                // QSA path
                if ( support.qsa && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
                        nid = old = expando;
                        newContext = context;
                        newSelector = nodeType !== 1 && selector;

                        // qSA works strangely on Element-rooted queries
                        // We can work around this by specifying an extra ID on the root
                        // and working up from there (Thanks to Andrew Dupont for the technique)
                        // IE 8 doesn't work on object elements
                        if ( nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
                                groups = tokenize( selector );

                                if ( (old = context.getAttribute("id")) ) {
                                        nid = old.replace( rescape, "\\$&" );
                                } else {
                                        context.setAttribute( "id", nid );
                                }
                                nid = "[id='" + nid + "'] ";

                                i = groups.length;
                                while ( i-- ) {
                                        groups[i] = nid + toSelector( groups[i] );
                                }
                                newContext = rsibling.test( selector ) && testContext( context.parentNode ) || context;
                                newSelector = groups.join(",");
                        }

                        if ( newSelector ) {
                                try {
                                        push.apply( results,
                                                newContext.querySelectorAll( newSelector )
                                        );
                                        return results;
                                } catch(qsaError) {
                                } finally {
                                        if ( !old ) {
                                                context.removeAttribute("id");
                                        }
                                }
                        }
                }
        }

        // All others
        return select( selector.replace( rtrim, "$1" ), context, results, seed );
}

/**
 * Create key-value caches of limited size
 * @returns {Function(string, Object)} Returns the Object data after storing it on itself with
 *      property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
 *      deleting the oldest entry
 */
function createCache() {
        var keys = [];

        function cache( key, value ) {
                // Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
                if ( keys.push( key + " " ) > Expr.cacheLength ) {
                        // Only keep the most recent entries
                        delete cache[ keys.shift() ];
                }
                return (cache[ key + " " ] = value);
        }
        return cache;
}

/**
 * Mark a function for special use by Sizzle
 * @param {Function} fn The function to mark
 */
function markFunction( fn ) {
        fn[ expando ] = true;
        return fn;
}

/**
 * Support testing using an element
 * @param {Function} fn Passed the created div and expects a boolean result
 */
function assert( fn ) {
        var div = document.createElement("div");

        try {
                return !!fn( div );
        } catch (e) {
                return false;
        } finally {
                // Remove from its parent by default
                if ( div.parentNode ) {
                        div.parentNode.removeChild( div );
                }
                // release memory in IE
                div = null;
        }
}

/**
 * Adds the same handler for all of the specified attrs
 * @param {String} attrs Pipe-separated list of attributes
 * @param {Function} handler The method that will be applied
 */
function addHandle( attrs, handler ) {
        var arr = attrs.split("|"),
                i = attrs.length;

        while ( i-- ) {
                Expr.attrHandle[ arr[i] ] = handler;
        }
}

/**
 * Checks document order of two siblings
 * @param {Element} a
 * @param {Element} b
 * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
 */
function siblingCheck( a, b ) {
        var cur = b && a,
                diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
                        ( ~b.sourceIndex || MAX_NEGATIVE ) -
                        ( ~a.sourceIndex || MAX_NEGATIVE );

        // Use IE sourceIndex if available on both nodes
        if ( diff ) {
                return diff;
        }

        // Check if b follows a
        if ( cur ) {
                while ( (cur = cur.nextSibling) ) {
                        if ( cur === b ) {
                                return -1;
                        }
                }
        }

        return a ? 1 : -1;
}

/**
 * Returns a function to use in pseudos for input types
 * @param {String} type
 */
function createInputPseudo( type ) {
        return function( elem ) {
                var name = elem.nodeName.toLowerCase();
                return name === "input" && elem.type === type;
        };
}

/**
 * Returns a function to use in pseudos for buttons
 * @param {String} type
 */
function createButtonPseudo( type ) {
        return function( elem ) {
                var name = elem.nodeName.toLowerCase();
                return (name === "input" || name === "button") && elem.type === type;
        };
}

/**
 * Returns a function to use in pseudos for positionals
 * @param {Function} fn
 */
function createPositionalPseudo( fn ) {
        return markFunction(function( argument ) {
                argument = +argument;
                return markFunction(function( seed, matches ) {
                        var j,
                                matchIndexes = fn( [], seed.length, argument ),
                                i = matchIndexes.length;

                        // Match elements found at the specified indexes
                        while ( i-- ) {
                                if ( seed[ (j = matchIndexes[i]) ] ) {
                                        seed[j] = !(matches[j] = seed[j]);
                                }
                        }
                });
        });
}

/**
 * Checks a node for validity as a Sizzle context
 * @param {Element|Object=} context
 * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
 */
function testContext( context ) {
        return context && typeof context.getElementsByTagName !== "undefined" && context;
}

// Expose support vars for convenience
support = Sizzle.support = {};

/**
 * Detects XML nodes
 * @param {Element|Object} elem An element or a document
 * @returns {Boolean} True iff elem is a non-HTML XML node
 */
isXML = Sizzle.isXML = function( elem ) {
        // documentElement is verified for cases where it doesn't yet exist
        // (such as loading iframes in IE - #4833)
        var documentElement = elem && (elem.ownerDocument || elem).documentElement;
        return documentElement ? documentElement.nodeName !== "HTML" : false;
};

/**
 * Sets document-related variables once based on the current document
 * @param {Element|Object} [doc] An element or document object to use to set the document
 * @returns {Object} Returns the current document
 */
setDocument = Sizzle.setDocument = function( node ) {
        var hasCompare, parent,
                doc = node ? node.ownerDocument || node : preferredDoc;

        // If no document and documentElement is available, return
        if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
                return document;
        }

        // Set our document
        document = doc;
        docElem = doc.documentElement;
        parent = doc.defaultView;

        // Support: IE>8
        // If iframe document is assigned to "document" variable and if iframe has been reloaded,
        // IE will throw "permission denied" error when accessing "document" variable, see jQuery #13936
        // IE6-8 do not support the defaultView property so parent will be undefined
        if ( parent && parent !== parent.top ) {
                // IE11 does not have attachEvent, so all must suffer
                if ( parent.addEventListener ) {
                        parent.addEventListener( "unload", unloadHandler, false );
                } else if ( parent.attachEvent ) {
                        parent.attachEvent( "onunload", unloadHandler );
                }
        }

        /* Support tests
        ---------------------------------------------------------------------- */
        documentIsHTML = !isXML( doc );

        /* Attributes
        ---------------------------------------------------------------------- */

        // Support: IE<8
        // Verify that getAttribute really returns attributes and not properties
        // (excepting IE8 booleans)
        support.attributes = assert(function( div ) {
                div.className = "i";
                return !div.getAttribute("className");
        });

        /* getElement(s)By*
        ---------------------------------------------------------------------- */

        // Check if getElementsByTagName("*") returns only elements
        support.getElementsByTagName = assert(function( div ) {
                div.appendChild( doc.createComment("") );
                return !div.getElementsByTagName("*").length;
        });

        // Support: IE<9
        support.getElementsByClassName = rnative.test( doc.getElementsByClassName );

        // Support: IE<10
        // Check if getElementById returns elements by name
        // The broken getElementById methods don't pick up programatically-set names,
        // so use a roundabout getElementsByName test
        support.getById = assert(function( div ) {
                docElem.appendChild( div ).id = expando;
                return !doc.getElementsByName || !doc.getElementsByName( expando ).length;
        });

        // ID find and filter
        if ( support.getById ) {
                Expr.find["ID"] = function( id, context ) {
                        if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
                                var m = context.getElementById( id );
                                // Check parentNode to catch when Blackberry 4.6 returns
                                // nodes that are no longer in the document #6963
                                return m && m.parentNode ? [ m ] : [];
                        }
                };
                Expr.filter["ID"] = function( id ) {
                        var attrId = id.replace( runescape, funescape );
                        return function( elem ) {
                                return elem.getAttribute("id") === attrId;
                        };
                };
        } else {
                // Support: IE6/7
                // getElementById is not reliable as a find shortcut
                delete Expr.find["ID"];

                Expr.filter["ID"] =  function( id ) {
                        var attrId = id.replace( runescape, funescape );
                        return function( elem ) {
                                var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
                                return node && node.value === attrId;
                        };
                };
        }

        // Tag
        Expr.find["TAG"] = support.getElementsByTagName ?
                function( tag, context ) {
                        if ( typeof context.getElementsByTagName !== "undefined" ) {
                                return context.getElementsByTagName( tag );

                        // DocumentFragment nodes don't have gEBTN
                        } else if ( support.qsa ) {
                                return context.querySelectorAll( tag );
                        }
                } :

                function( tag, context ) {
                        var elem,
                                tmp = [],
                                i = 0,
                                // By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
                                results = context.getElementsByTagName( tag );

                        // Filter out possible comments
                        if ( tag === "*" ) {
                                while ( (elem = results[i++]) ) {
                                        if ( elem.nodeType === 1 ) {
                                                tmp.push( elem );
                                        }
                                }

                                return tmp;
                        }
                        return results;
                };

        // Class
        Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
                if ( documentIsHTML ) {
                        return context.getElementsByClassName( className );
                }
        };

        /* QSA/matchesSelector
        ---------------------------------------------------------------------- */

        // QSA and matchesSelector support

        // matchesSelector(:active) reports false when true (IE9/Opera 11.5)
        rbuggyMatches = [];

        // qSa(:focus) reports false when true (Chrome 21)
        // We allow this because of a bug in IE8/9 that throws an error
        // whenever `document.activeElement` is accessed on an iframe
        // So, we allow :focus to pass through QSA all the time to avoid the IE error
        // See http://bugs.jquery.com/ticket/13378
        rbuggyQSA = [];

        if ( (support.qsa = rnative.test( doc.querySelectorAll )) ) {
                // Build QSA regex
                // Regex strategy adopted from Diego Perini
                assert(function( div ) {
                        // Select is set to empty string on purpose
                        // This is to test IE's treatment of not explicitly
                        // setting a boolean content attribute,
                        // since its presence should be enough
                        // http://bugs.jquery.com/ticket/12359
                        docElem.appendChild( div ).innerHTML = "<a id='" + expando + "'></a>" +
                                "<select id='" + expando + "-\f]' msallowcapture=''>" +
                                "<option selected=''></option></select>";

                        // Support: IE8, Opera 11-12.16
                        // Nothing should be selected when empty strings follow ^= or $= or *=
                        // The test attribute must be unknown in Opera but "safe" for WinRT
                        // http://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
                        if ( div.querySelectorAll("[msallowcapture^='']").length ) {
                                rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
                        }

                        // Support: IE8
                        // Boolean attributes and "value" are not treated correctly
                        if ( !div.querySelectorAll("[selected]").length ) {
                                rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
                        }

                        // Support: Chrome<29, Android<4.2+, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.7+
                        if ( !div.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
                                rbuggyQSA.push("~=");
                        }

                        // Webkit/Opera - :checked should return selected option elements
                        // http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
                        // IE8 throws error here and will not see later tests
                        if ( !div.querySelectorAll(":checked").length ) {
                                rbuggyQSA.push(":checked");
                        }

                        // Support: Safari 8+, iOS 8+
                        // https://bugs.webkit.org/show_bug.cgi?id=136851
                        // In-page `selector#id sibing-combinator selector` fails
                        if ( !div.querySelectorAll( "a#" + expando + "+*" ).length ) {
                                rbuggyQSA.push(".#.+[+~]");
                        }
                });

                assert(function( div ) {
                        // Support: Windows 8 Native Apps
                        // The type and name attributes are restricted during .innerHTML assignment
                        var input = doc.createElement("input");
                        input.setAttribute( "type", "hidden" );
                        div.appendChild( input ).setAttribute( "name", "D" );

                        // Support: IE8
                        // Enforce case-sensitivity of name attribute
                        if ( div.querySelectorAll("[name=d]").length ) {
                                rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
                        }

                        // FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
                        // IE8 throws error here and will not see later tests
                        if ( !div.querySelectorAll(":enabled").length ) {
                                rbuggyQSA.push( ":enabled", ":disabled" );
                        }

                        // Opera 10-11 does not throw on post-comma invalid pseudos
                        div.querySelectorAll("*,:x");
                        rbuggyQSA.push(",.*:");
                });
        }

        if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
                docElem.webkitMatchesSelector ||
                docElem.mozMatchesSelector ||
                docElem.oMatchesSelector ||
                docElem.msMatchesSelector) )) ) {

                assert(function( div ) {
                        // Check to see if it's possible to do matchesSelector
                        // on a disconnected node (IE 9)
                        support.disconnectedMatch = matches.call( div, "div" );

                        // This should fail with an exception
                        // Gecko does not error, returns false instead
                        matches.call( div, "[s!='']:x" );
                        rbuggyMatches.push( "!=", pseudos );
                });
        }

        rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
        rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );

        /* Contains
        ---------------------------------------------------------------------- */
        hasCompare = rnative.test( docElem.compareDocumentPosition );

        // Element contains another
        // Purposefully does not implement inclusive descendent
        // As in, an element does not contain itself
        contains = hasCompare || rnative.test( docElem.contains ) ?
                function( a, b ) {
                        var adown = a.nodeType === 9 ? a.documentElement : a,
                                bup = b && b.parentNode;
                        return a === bup || !!( bup && bup.nodeType === 1 && (
                                adown.contains ?
                                        adown.contains( bup ) :
                                        a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
                        ));
                } :
                function( a, b ) {
                        if ( b ) {
                                while ( (b = b.parentNode) ) {
                                        if ( b === a ) {
                                                return true;
                                        }
                                }
                        }
                        return false;
                };

        /* Sorting
        ---------------------------------------------------------------------- */

        // Document order sorting
        sortOrder = hasCompare ?
        function( a, b ) {

                // Flag for duplicate removal
                if ( a === b ) {
                        hasDuplicate = true;
                        return 0;
                }

                // Sort on method existence if only one input has compareDocumentPosition
                var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
                if ( compare ) {
                        return compare;
                }

                // Calculate position if both inputs belong to the same document
                compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
                        a.compareDocumentPosition( b ) :

                        // Otherwise we know they are disconnected
                        1;

                // Disconnected nodes
                if ( compare & 1 ||
                        (!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {

                        // Choose the first element that is related to our preferred document
                        if ( a === doc || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
                                return -1;
                        }
                        if ( b === doc || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
                                return 1;
                        }

                        // Maintain original order
                        return sortInput ?
                                ( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
                                0;
                }

                return compare & 4 ? -1 : 1;
        } :
        function( a, b ) {
                // Exit early if the nodes are identical
                if ( a === b ) {
                        hasDuplicate = true;
                        return 0;
                }

                var cur,
                        i = 0,
                        aup = a.parentNode,
                        bup = b.parentNode,
                        ap = [ a ],
                        bp = [ b ];

                // Parentless nodes are either documents or disconnected
                if ( !aup || !bup ) {
                        return a === doc ? -1 :
                                b === doc ? 1 :
                                aup ? -1 :
                                bup ? 1 :
                                sortInput ?
                                ( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
                                0;

                // If the nodes are siblings, we can do a quick check
                } else if ( aup === bup ) {
                        return siblingCheck( a, b );
                }

                // Otherwise we need full lists of their ancestors for comparison
                cur = a;
                while ( (cur = cur.parentNode) ) {
                        ap.unshift( cur );
                }
                cur = b;
                while ( (cur = cur.parentNode) ) {
                        bp.unshift( cur );
                }

                // Walk down the tree looking for a discrepancy
                while ( ap[i] === bp[i] ) {
                        i++;
                }

                return i ?
                        // Do a sibling check if the nodes have a common ancestor
                        siblingCheck( ap[i], bp[i] ) :

                        // Otherwise nodes in our document sort first
                        ap[i] === preferredDoc ? -1 :
                        bp[i] === preferredDoc ? 1 :
                        0;
        };

        return doc;
};

Sizzle.matches = function( expr, elements ) {
        return Sizzle( expr, null, null, elements );
};

Sizzle.matchesSelector = function( elem, expr ) {
        // Set document vars if needed
        if ( ( elem.ownerDocument || elem ) !== document ) {
                setDocument( elem );
        }

        // Make sure that attribute selectors are quoted
        expr = expr.replace( rattributeQuotes, "='$1']" );

        if ( support.matchesSelector && documentIsHTML &&
                ( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
                ( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {

                try {
                        var ret = matches.call( elem, expr );

                        // IE 9's matchesSelector returns false on disconnected nodes
                        if ( ret || support.disconnectedMatch ||
                                        // As well, disconnected nodes are said to be in a document
                                        // fragment in IE 9
                                        elem.document && elem.document.nodeType !== 11 ) {
                                return ret;
                        }
                } catch (e) {}
        }

        return Sizzle( expr, document, null, [ elem ] ).length > 0;
};

Sizzle.contains = function( context, elem ) {
        // Set document vars if needed
        if ( ( context.ownerDocument || context ) !== document ) {
                setDocument( context );
        }
        return contains( context, elem );
};

Sizzle.attr = function( elem, name ) {
        // Set document vars if needed
        if ( ( elem.ownerDocument || elem ) !== document ) {
                setDocument( elem );
        }

        var fn = Expr.attrHandle[ name.toLowerCase() ],
                // Don't get fooled by Object.prototype properties (jQuery #13807)
                val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
                        fn( elem, name, !documentIsHTML ) :
                        undefined;

        return val !== undefined ?
                val :
                support.attributes || !documentIsHTML ?
                        elem.getAttribute( name ) :
                        (val = elem.getAttributeNode(name)) && val.specified ?
                                val.value :
                                null;
};

Sizzle.error = function( msg ) {
        throw new Error( "Syntax error, unrecognized expression: " + msg );
};

/**
 * Document sorting and removing duplicates
 * @param {ArrayLike} results
 */
Sizzle.uniqueSort = function( results ) {
        var elem,
                duplicates = [],
                j = 0,
                i = 0;

        // Unless we *know* we can detect duplicates, assume their presence
        hasDuplicate = !support.detectDuplicates;
        sortInput = !support.sortStable && results.slice( 0 );
        results.sort( sortOrder );

        if ( hasDuplicate ) {
                while ( (elem = results[i++]) ) {
                        if ( elem === results[ i ] ) {
                                j = duplicates.push( i );
                        }
                }
                while ( j-- ) {
                        results.splice( duplicates[ j ], 1 );
                }
        }

        // Clear input after sorting to release objects
        // See https://github.com/jquery/sizzle/pull/225
        sortInput = null;

        return results;
};

/**
 * Utility function for retrieving the text value of an array of DOM nodes
 * @param {Array|Element} elem
 */
getText = Sizzle.getText = function( elem ) {
        var node,
                ret = "",
                i = 0,
                nodeType = elem.nodeType;

        if ( !nodeType ) {
                // If no nodeType, this is expected to be an array
                while ( (node = elem[i++]) ) {
                        // Do not traverse comment nodes
                        ret += getText( node );
                }
        } else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
                // Use textContent for elements
                // innerText usage removed for consistency of new lines (jQuery #11153)
                if ( typeof elem.textContent === "string" ) {
                        return elem.textContent;
                } else {
                        // Traverse its children
                        for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
                                ret += getText( elem );
                        }
                }
        } else if ( nodeType === 3 || nodeType === 4 ) {
                return elem.nodeValue;
        }
        // Do not include comment or processing instruction nodes

        return ret;
};

Expr = Sizzle.selectors = {

        // Can be adjusted by the user
        cacheLength: 50,

        createPseudo: markFunction,

        match: matchExpr,

        attrHandle: {},

        find: {},

        relative: {
                ">": { dir: "parentNode", first: true },
                " ": { dir: "parentNode" },
                "+": { dir: "previousSibling", first: true },
                "~": { dir: "previousSibling" }
        },

        preFilter: {
                "ATTR": function( match ) {
                        match[1] = match[1].replace( runescape, funescape );

                        // Move the given value to match[3] whether quoted or unquoted
                        match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );

                        if ( match[2] === "~=" ) {
                                match[3] = " " + match[3] + " ";
                        }

                        return match.slice( 0, 4 );
                },

                "CHILD": function( match ) {
                        /* matches from matchExpr["CHILD"]
                                1 type (only|nth|...)
                                2 what (child|of-type)
                                3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
                                4 xn-component of xn+y argument ([+-]?\d*n|)
                                5 sign of xn-component
                                6 x of xn-component
                                7 sign of y-component
                                8 y of y-component
                        */
                        match[1] = match[1].toLowerCase();

                        if ( match[1].slice( 0, 3 ) === "nth" ) {
                                // nth-* requires argument
                                if ( !match[3] ) {
                                        Sizzle.error( match[0] );
                                }

                                // numeric x and y parameters for Expr.filter.CHILD
                                // remember that false/true cast respectively to 0/1
                                match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
                                match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );

                        // other types prohibit arguments
                        } else if ( match[3] ) {
                                Sizzle.error( match[0] );
                        }

                        return match;
                },

                "PSEUDO": function( match ) {
                        var excess,
                                unquoted = !match[6] && match[2];

                        if ( matchExpr["CHILD"].test( match[0] ) ) {
                                return null;
                        }

                        // Accept quoted arguments as-is
                        if ( match[3] ) {
                                match[2] = match[4] || match[5] || "";

                        // Strip excess characters from unquoted arguments
                        } else if ( unquoted && rpseudo.test( unquoted ) &&
                                // Get excess from tokenize (recursively)
                                (excess = tokenize( unquoted, true )) &&
                                // advance to the next closing parenthesis
                                (excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {

                                // excess is a negative index
                                match[0] = match[0].slice( 0, excess );
                                match[2] = unquoted.slice( 0, excess );
                        }

                        // Return only captures needed by the pseudo filter method (type and argument)
                        return match.slice( 0, 3 );
                }
        },

        filter: {

                "TAG": function( nodeNameSelector ) {
                        var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
                        return nodeNameSelector === "*" ?
                                function() { return true; } :
                                function( elem ) {
                                        return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
                                };
                },

                "CLASS": function( className ) {
                        var pattern = classCache[ className + " " ];

                        return pattern ||
                                (pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
                                classCache( className, function( elem ) {
                                        return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
                                });
                },

                "ATTR": function( name, operator, check ) {
                        return function( elem ) {
                                var result = Sizzle.attr( elem, name );

                                if ( result == null ) {
                                        return operator === "!=";
                                }
                                if ( !operator ) {
                                        return true;
                                }

                                result += "";

                                return operator === "=" ? result === check :
                                        operator === "!=" ? result !== check :
                                        operator === "^=" ? check && result.indexOf( check ) === 0 :
                                        operator === "*=" ? check && result.indexOf( check ) > -1 :
                                        operator === "$=" ? check && result.slice( -check.length ) === check :
                                        operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
                                        operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
                                        false;
                        };
                },

                "CHILD": function( type, what, argument, first, last ) {
                        var simple = type.slice( 0, 3 ) !== "nth",
                                forward = type.slice( -4 ) !== "last",
                                ofType = what === "of-type";

                        return first === 1 && last === 0 ?

                                // Shortcut for :nth-*(n)
                                function( elem ) {
                                        return !!elem.parentNode;
                                } :

                                function( elem, context, xml ) {
                                        var cache, outerCache, node, diff, nodeIndex, start,
                                                dir = simple !== forward ? "nextSibling" : "previousSibling",
                                                parent = elem.parentNode,
                                                name = ofType && elem.nodeName.toLowerCase(),
                                                useCache = !xml && !ofType;

                                        if ( parent ) {

                                                // :(first|last|only)-(child|of-type)
                                                if ( simple ) {
                                                        while ( dir ) {
                                                                node = elem;
                                                                while ( (node = node[ dir ]) ) {
                                                                        if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
                                                                                return false;
                                                                        }
                                                                }
                                                                // Reverse direction for :only-* (if we haven't yet done so)
                                                                start = dir = type === "only" && !start && "nextSibling";
                                                        }
                                                        return true;
                                                }

                                                start = [ forward ? parent.firstChild : parent.lastChild ];

                                                // non-xml :nth-child(...) stores cache data on `parent`
                                                if ( forward && useCache ) {
                                                        // Seek `elem` from a previously-cached index
                                                        outerCache = parent[ expando ] || (parent[ expando ] = {});
                                                        cache = outerCache[ type ] || [];
                                                        nodeIndex = cache[0] === dirruns && cache[1];
                                                        diff = cache[0] === dirruns && cache[2];
                                                        node = nodeIndex && parent.childNodes[ nodeIndex ];

                                                        while ( (node = ++nodeIndex && node && node[ dir ] ||

                                                                // Fallback to seeking `elem` from the start
                                                                (diff = nodeIndex = 0) || start.pop()) ) {

                                                                // When found, cache indexes on `parent` and break
                                                                if ( node.nodeType === 1 && ++diff && node === elem ) {
                                                                        outerCache[ type ] = [ dirruns, nodeIndex, diff ];
                                                                        break;
                                                                }
                                                        }

                                                // Use previously-cached element index if available
                                                } else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
                                                        diff = cache[1];

                                                // xml :nth-child(...) or :nth-last-child(...) or :nth(-last)?-of-type(...)
                                                } else {
                                                        // Use the same loop as above to seek `elem` from the start
                                                        while ( (node = ++nodeIndex && node && node[ dir ] ||
                                                                (diff = nodeIndex = 0) || start.pop()) ) {

                                                                if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
                                                                        // Cache the index of each encountered element
                                                                        if ( useCache ) {
                                                                                (node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
                                                                        }

                                                                        if ( node === elem ) {
                                                                                break;
                                                                        }
                                                                }
                                                        }
                                                }

                                                // Incorporate the offset, then check against cycle size
                                                diff -= last;
                                                return diff === first || ( diff % first === 0 && diff / first >= 0 );
                                        }
                                };
                },

                "PSEUDO": function( pseudo, argument ) {
                        // pseudo-class names are case-insensitive
                        // http://www.w3.org/TR/selectors/#pseudo-classes
                        // Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
                        // Remember that setFilters inherits from pseudos
                        var args,
                                fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
                                        Sizzle.error( "unsupported pseudo: " + pseudo );

                        // The user may use createPseudo to indicate that
                        // arguments are needed to create the filter function
                        // just as Sizzle does
                        if ( fn[ expando ] ) {
                                return fn( argument );
                        }

                        // But maintain support for old signatures
                        if ( fn.length > 1 ) {
                                args = [ pseudo, pseudo, "", argument ];
                                return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
                                        markFunction(function( seed, matches ) {
                                                var idx,
                                                        matched = fn( seed, argument ),
                                                        i = matched.length;
                                                while ( i-- ) {
                                                        idx = indexOf( seed, matched[i] );
                                                        seed[ idx ] = !( matches[ idx ] = matched[i] );
                                                }
                                        }) :
                                        function( elem ) {
                                                return fn( elem, 0, args );
                                        };
                        }

                        return fn;
                }
        },

        pseudos: {
                // Potentially complex pseudos
                "not": markFunction(function( selector ) {
                        // Trim the selector passed to compile
                        // to avoid treating leading and trailing
                        // spaces as combinators
                        var input = [],
                                results = [],
                                matcher = compile( selector.replace( rtrim, "$1" ) );

                        return matcher[ expando ] ?
                                markFunction(function( seed, matches, context, xml ) {
                                        var elem,
                                                unmatched = matcher( seed, null, xml, [] ),
                                                i = seed.length;

                                        // Match elements unmatched by `matcher`
                                        while ( i-- ) {
                                                if ( (elem = unmatched[i]) ) {
                                                        seed[i] = !(matches[i] = elem);
                                                }
                                        }
                                }) :
                                function( elem, context, xml ) {
                                        input[0] = elem;
                                        matcher( input, null, xml, results );
                                        // Don't keep the element (issue #299)
                                        input[0] = null;
                                        return !results.pop();
                                };
                }),

                "has": markFunction(function( selector ) {
                        return function( elem ) {
                                return Sizzle( selector, elem ).length > 0;
                        };
                }),

                "contains": markFunction(function( text ) {
                        text = text.replace( runescape, funescape );
                        return function( elem ) {
                                return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
                        };
                }),

                // "Whether an element is represented by a :lang() selector
                // is based solely on the element's language value
                // being equal to the identifier C,
                // or beginning with the identifier C immediately followed by "-".
                // The matching of C against the element's language value is performed case-insensitively.
                // The identifier C does not have to be a valid language name."
                // http://www.w3.org/TR/selectors/#lang-pseudo
                "lang": markFunction( function( lang ) {
                        // lang value must be a valid identifier
                        if ( !ridentifier.test(lang || "") ) {
                                Sizzle.error( "unsupported lang: " + lang );
                        }
                        lang = lang.replace( runescape, funescape ).toLowerCase();
                        return function( elem ) {
                                var elemLang;
                                do {
                                        if ( (elemLang = documentIsHTML ?
                                                elem.lang :
                                                elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {

                                                elemLang = elemLang.toLowerCase();
                                                return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
                                        }
                                } while ( (elem = elem.parentNode) && elem.nodeType === 1 );
                                return false;
                        };
                }),

                // Miscellaneous
                "target": function( elem ) {
                        var hash = window.location && window.location.hash;
                        return hash && hash.slice( 1 ) === elem.id;
                },

                "root": function( elem ) {
                        return elem === docElem;
                },

                "focus": function( elem ) {
                        return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
                },

                // Boolean properties
                "enabled": function( elem ) {
                        return elem.disabled === false;
                },

                "disabled": function( elem ) {
                        return elem.disabled === true;
                },

                "checked": function( elem ) {
                        // In CSS3, :checked should return both checked and selected elements
                        // http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
                        var nodeName = elem.nodeName.toLowerCase();
                        return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
                },

                "selected": function( elem ) {
                        // Accessing this property makes selected-by-default
                        // options in Safari work properly
                        if ( elem.parentNode ) {
                                elem.parentNode.selectedIndex;
                        }

                        return elem.selected === true;
                },

                // Contents
                "empty": function( elem ) {
                        // http://www.w3.org/TR/selectors/#empty-pseudo
                        // :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
                        //   but not by others (comment: 8; processing instruction: 7; etc.)
                        // nodeType < 6 works because attributes (2) do not appear as children
                        for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
                                if ( elem.nodeType < 6 ) {
                                        return false;
                                }
                        }
                        return true;
                },

                "parent": function( elem ) {
                        return !Expr.pseudos["empty"]( elem );
                },

                // Element/input types
                "header": function( elem ) {
                        return rheader.test( elem.nodeName );
                },

                "input": function( elem ) {
                        return rinputs.test( elem.nodeName );
                },

                "button": function( elem ) {
                        var name = elem.nodeName.toLowerCase();
                        return name === "input" && elem.type === "button" || name === "button";
                },

                "text": function( elem ) {
                        var attr;
                        return elem.nodeName.toLowerCase() === "input" &&
                                elem.type === "text" &&

                                // Support: IE<8
                                // New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
                                ( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
                },

                // Position-in-collection
                "first": createPositionalPseudo(function() {
                        return [ 0 ];
                }),

                "last": createPositionalPseudo(function( matchIndexes, length ) {
                        return [ length - 1 ];
                }),

                "eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
                        return [ argument < 0 ? argument + length : argument ];
                }),

                "even": createPositionalPseudo(function( matchIndexes, length ) {
                        var i = 0;
                        for ( ; i < length; i += 2 ) {
                                matchIndexes.push( i );
                        }
                        return matchIndexes;
                }),

                "odd": createPositionalPseudo(function( matchIndexes, length ) {
                        var i = 1;
                        for ( ; i < length; i += 2 ) {
                                matchIndexes.push( i );
                        }
                        return matchIndexes;
                }),

                "lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
                        var i = argument < 0 ? argument + length : argument;
                        for ( ; --i >= 0; ) {
                                matchIndexes.push( i );
                        }
                        return matchIndexes;
                }),

                "gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
                        var i = argument < 0 ? argument + length : argument;
                        for ( ; ++i < length; ) {
                                matchIndexes.push( i );
                        }
                        return matchIndexes;
                })
        }
};

Expr.pseudos["nth"] = Expr.pseudos["eq"];

// Add button/input type pseudos
for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
        Expr.pseudos[ i ] = createInputPseudo( i );
}
for ( i in { submit: true, reset: true } ) {
        Expr.pseudos[ i ] = createButtonPseudo( i );
}

// Easy API for creating new setFilters
function setFilters() {}
setFilters.prototype = Expr.filters = Expr.pseudos;
Expr.setFilters = new setFilters();

tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
        var matched, match, tokens, type,
                soFar, groups, preFilters,
                cached = tokenCache[ selector + " " ];

        if ( cached ) {
                return parseOnly ? 0 : cached.slice( 0 );
        }

        soFar = selector;
        groups = [];
        preFilters = Expr.preFilter;

        while ( soFar ) {

                // Comma and first run
                if ( !matched || (match = rcomma.exec( soFar )) ) {
                        if ( match ) {
                                // Don't consume trailing commas as valid
                                soFar = soFar.slice( match[0].length ) || soFar;
                        }
                        groups.push( (tokens = []) );
                }

                matched = false;

                // Combinators
                if ( (match = rcombinators.exec( soFar )) ) {
                        matched = match.shift();
                        tokens.push({
                                value: matched,
                                // Cast descendant combinators to space
                                type: match[0].replace( rtrim, " " )
                        });
                        soFar = soFar.slice( matched.length );
                }

                // Filters
                for ( type in Expr.filter ) {
                        if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
                                (match = preFilters[ type ]( match ))) ) {
                                matched = match.shift();
                                tokens.push({
                                        value: matched,
                                        type: type,
                                        matches: match
                                });
                                soFar = soFar.slice( matched.length );
                        }
                }

                if ( !matched ) {
                        break;
                }
        }

        // Return the length of the invalid excess
        // if we're just parsing
        // Otherwise, throw an error or return tokens
        return parseOnly ?
                soFar.length :
                soFar ?
                        Sizzle.error( selector ) :
                        // Cache the tokens
                        tokenCache( selector, groups ).slice( 0 );
};

function toSelector( tokens ) {
        var i = 0,
                len = tokens.length,
                selector = "";
        for ( ; i < len; i++ ) {
                selector += tokens[i].value;
        }
        return selector;
}

function addCombinator( matcher, combinator, base ) {
        var dir = combinator.dir,
                checkNonElements = base && dir === "parentNode",
                doneName = done++;

        return combinator.first ?
                // Check against closest ancestor/preceding element
                function( elem, context, xml ) {
                        while ( (elem = elem[ dir ]) ) {
                                if ( elem.nodeType === 1 || checkNonElements ) {
                                        return matcher( elem, context, xml );
                                }
                        }
                } :

                // Check against all ancestor/preceding elements
                function( elem, context, xml ) {
                        var oldCache, outerCache,
                                newCache = [ dirruns, doneName ];

                        // We can't set arbitrary data on XML nodes, so they don't benefit from dir caching
                        if ( xml ) {
                                while ( (elem = elem[ dir ]) ) {
                                        if ( elem.nodeType === 1 || checkNonElements ) {
                                                if ( matcher( elem, context, xml ) ) {
                                                        return true;
                                                }
                                        }
                                }
                        } else {
                                while ( (elem = elem[ dir ]) ) {
                                        if ( elem.nodeType === 1 || checkNonElements ) {
                                                outerCache = elem[ expando ] || (elem[ expando ] = {});
                                                if ( (oldCache = outerCache[ dir ]) &&
                                                        oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {

                                                        // Assign to newCache so results back-propagate to previous elements
                                                        return (newCache[ 2 ] = oldCache[ 2 ]);
                                                } else {
                                                        // Reuse newcache so results back-propagate to previous elements
                                                        outerCache[ dir ] = newCache;

                                                        // A match means we're done; a fail means we have to keep checking
                                                        if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
                                                                return true;
                                                        }
                                                }
                                        }
                                }
                        }
                };
}

function elementMatcher( matchers ) {
        return matchers.length > 1 ?
                function( elem, context, xml ) {
                        var i = matchers.length;
                        while ( i-- ) {
                                if ( !matchers[i]( elem, context, xml ) ) {
                                        return false;
                                }
                        }
                        return true;
                } :
                matchers[0];
}

function multipleContexts( selector, contexts, results ) {
        var i = 0,
                len = contexts.length;
        for ( ; i < len; i++ ) {
                Sizzle( selector, contexts[i], results );
        }
        return results;
}

function condense( unmatched, map, filter, context, xml ) {
        var elem,
                newUnmatched = [],
                i = 0,
                len = unmatched.length,
                mapped = map != null;

        for ( ; i < len; i++ ) {
                if ( (elem = unmatched[i]) ) {
                        if ( !filter || filter( elem, context, xml ) ) {
                                newUnmatched.push( elem );
                                if ( mapped ) {
                                        map.push( i );
                                }
                        }
                }
        }

        return newUnmatched;
}

function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
        if ( postFilter && !postFilter[ expando ] ) {
                postFilter = setMatcher( postFilter );
        }
        if ( postFinder && !postFinder[ expando ] ) {
                postFinder = setMatcher( postFinder, postSelector );
        }
        return markFunction(function( seed, results, context, xml ) {
                var temp, i, elem,
                        preMap = [],
                        postMap = [],
                        preexisting = results.length,

                        // Get initial elements from seed or context
                        elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),

                        // Prefilter to get matcher input, preserving a map for seed-results synchronization
                        matcherIn = preFilter && ( seed || !selector ) ?
                                condense( elems, preMap, preFilter, context, xml ) :
                                elems,

                        matcherOut = matcher ?
                                // If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
                                postFinder || ( seed ? preFilter : preexisting || postFilter ) ?

                                        // ...intermediate processing is necessary
                                        [] :

                                        // ...otherwise use results directly
                                        results :
                                matcherIn;

                // Find primary matches
                if ( matcher ) {
                        matcher( matcherIn, matcherOut, context, xml );
                }

                // Apply postFilter
                if ( postFilter ) {
                        temp = condense( matcherOut, postMap );
                        postFilter( temp, [], context, xml );

                        // Un-match failing elements by moving them back to matcherIn
                        i = temp.length;
                        while ( i-- ) {
                                if ( (elem = temp[i]) ) {
                                        matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
                                }
                        }
                }

                if ( seed ) {
                        if ( postFinder || preFilter ) {
                                if ( postFinder ) {
                                        // Get the final matcherOut by condensing this intermediate into postFinder contexts
                                        temp = [];
                                        i = matcherOut.length;
                                        while ( i-- ) {
                                                if ( (elem = matcherOut[i]) ) {
                                                        // Restore matcherIn since elem is not yet a final match
                                                        temp.push( (matcherIn[i] = elem) );
                                                }
                                        }
                                        postFinder( null, (matcherOut = []), temp, xml );
                                }

                                // Move matched elements from seed to results to keep them synchronized
                                i = matcherOut.length;
                                while ( i-- ) {
                                        if ( (elem = matcherOut[i]) &&
                                                (temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {

                                                seed[temp] = !(results[temp] = elem);
                                        }
                                }
                        }

                // Add elements to results, through postFinder if defined
                } else {
                        matcherOut = condense(
                                matcherOut === results ?
                                        matcherOut.splice( preexisting, matcherOut.length ) :
                                        matcherOut
                        );
                        if ( postFinder ) {
                                postFinder( null, results, matcherOut, xml );
                        } else {
                                push.apply( results, matcherOut );
                        }
                }
        });
}

function matcherFromTokens( tokens ) {
        var checkContext, matcher, j,
                len = tokens.length,
                leadingRelative = Expr.relative[ tokens[0].type ],
                implicitRelative = leadingRelative || Expr.relative[" "],
                i = leadingRelative ? 1 : 0,

                // The foundational matcher ensures that elements are reachable from top-level context(s)
                matchContext = addCombinator( function( elem ) {
                        return elem === checkContext;
                }, implicitRelative, true ),
                matchAnyContext = addCombinator( function( elem ) {
                        return indexOf( checkContext, elem ) > -1;
                }, implicitRelative, true ),
                matchers = [ function( elem, context, xml ) {
                        var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
                                (checkContext = context).nodeType ?
                                        matchContext( elem, context, xml ) :
                                        matchAnyContext( elem, context, xml ) );
                        // Avoid hanging onto element (issue #299)
                        checkContext = null;
                        return ret;
                } ];

        for ( ; i < len; i++ ) {
                if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
                        matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
                } else {
                        matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );

                        // Return special upon seeing a positional matcher
                        if ( matcher[ expando ] ) {
                                // Find the next relative operator (if any) for proper handling
                                j = ++i;
                                for ( ; j < len; j++ ) {
                                        if ( Expr.relative[ tokens[j].type ] ) {
                                                break;
                                        }
                                }
                                return setMatcher(
                                        i > 1 && elementMatcher( matchers ),
                                        i > 1 && toSelector(
                                                // If the preceding token was a descendant combinator, insert an implicit any-element `*`
                                                tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
                                        ).replace( rtrim, "$1" ),
                                        matcher,
                                        i < j && matcherFromTokens( tokens.slice( i, j ) ),
                                        j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
                                        j < len && toSelector( tokens )
                                );
                        }
                        matchers.push( matcher );
                }
        }

        return elementMatcher( matchers );
}

function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
        var bySet = setMatchers.length > 0,
                byElement = elementMatchers.length > 0,
                superMatcher = function( seed, context, xml, results, outermost ) {
                        var elem, j, matcher,
                                matchedCount = 0,
                                i = "0",
                                unmatched = seed && [],
                                setMatched = [],
                                contextBackup = outermostContext,
                                // We must always have either seed elements or outermost context
                                elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
                                // Use integer dirruns iff this is the outermost matcher
                                dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
                                len = elems.length;

                        if ( outermost ) {
                                outermostContext = context !== document && context;
                        }

                        // Add elements passing elementMatchers directly to results
                        // Keep `i` a string if there are no elements so `matchedCount` will be "00" below
                        // Support: IE<9, Safari
                        // Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
                        for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
                                if ( byElement && elem ) {
                                        j = 0;
                                        while ( (matcher = elementMatchers[j++]) ) {
                                                if ( matcher( elem, context, xml ) ) {
                                                        results.push( elem );
                                                        break;
                                                }
                                        }
                                        if ( outermost ) {
                                                dirruns = dirrunsUnique;
                                        }
                                }

                                // Track unmatched elements for set filters
                                if ( bySet ) {
                                        // They will have gone through all possible matchers
                                        if ( (elem = !matcher && elem) ) {
                                                matchedCount--;
                                        }

                                        // Lengthen the array for every element, matched or not
                                        if ( seed ) {
                                                unmatched.push( elem );
                                        }
                                }
                        }

                        // Apply set filters to unmatched elements
                        matchedCount += i;
                        if ( bySet && i !== matchedCount ) {
                                j = 0;
                                while ( (matcher = setMatchers[j++]) ) {
                                        matcher( unmatched, setMatched, context, xml );
                                }

                                if ( seed ) {
                                        // Reintegrate element matches to eliminate the need for sorting
                                        if ( matchedCount > 0 ) {
                                                while ( i-- ) {
                                                        if ( !(unmatched[i] || setMatched[i]) ) {
                                                                setMatched[i] = pop.call( results );
                                                        }
                                                }
                                        }

                                        // Discard index placeholder values to get only actual matches
                                        setMatched = condense( setMatched );
                                }

                                // Add matches to results
                                push.apply( results, setMatched );

                                // Seedless set matches succeeding multiple successful matchers stipulate sorting
                                if ( outermost && !seed && setMatched.length > 0 &&
                                        ( matchedCount + setMatchers.length ) > 1 ) {

                                        Sizzle.uniqueSort( results );
                                }
                        }

                        // Override manipulation of globals by nested matchers
                        if ( outermost ) {
                                dirruns = dirrunsUnique;
                                outermostContext = contextBackup;
                        }

                        return unmatched;
                };

        return bySet ?
                markFunction( superMatcher ) :
                superMatcher;
}

compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
        var i,
                setMatchers = [],
                elementMatchers = [],
                cached = compilerCache[ selector + " " ];

        if ( !cached ) {
                // Generate a function of recursive functions that can be used to check each element
                if ( !match ) {
                        match = tokenize( selector );
                }
                i = match.length;
                while ( i-- ) {
                        cached = matcherFromTokens( match[i] );
                        if ( cached[ expando ] ) {
                                setMatchers.push( cached );
                        } else {
                                elementMatchers.push( cached );
                        }
                }

                // Cache the compiled function
                cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );

                // Save selector and tokenization
                cached.selector = selector;
        }
        return cached;
};

/**
 * A low-level selection function that works with Sizzle's compiled
 *  selector functions
 * @param {String|Function} selector A selector or a pre-compiled
 *  selector function built with Sizzle.compile
 * @param {Element} context
 * @param {Array} [results]
 * @param {Array} [seed] A set of elements to match against
 */
select = Sizzle.select = function( selector, context, results, seed ) {
        var i, tokens, token, type, find,
                compiled = typeof selector === "function" && selector,
                match = !seed && tokenize( (selector = compiled.selector || selector) );

        results = results || [];

        // Try to minimize operations if there is no seed and only one group
        if ( match.length === 1 ) {

                // Take a shortcut and set the context if the root selector is an ID
                tokens = match[0] = match[0].slice( 0 );
                if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
                                support.getById && context.nodeType === 9 && documentIsHTML &&
                                Expr.relative[ tokens[1].type ] ) {

                        context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
                        if ( !context ) {
                                return results;

                        // Precompiled matchers will still verify ancestry, so step up a level
                        } else if ( compiled ) {
                                context = context.parentNode;
                        }

                        selector = selector.slice( tokens.shift().value.length );
                }

                // Fetch a seed set for right-to-left matching
                i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
                while ( i-- ) {
                        token = tokens[i];

                        // Abort if we hit a combinator
                        if ( Expr.relative[ (type = token.type) ] ) {
                                break;
                        }
                        if ( (find = Expr.find[ type ]) ) {
                                // Search, expanding context for leading sibling combinators
                                if ( (seed = find(
                                        token.matches[0].replace( runescape, funescape ),
                                        rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
                                )) ) {

                                        // If seed is empty or no tokens remain, we can return early
                                        tokens.splice( i, 1 );
                                        selector = seed.length && toSelector( tokens );
                                        if ( !selector ) {
                                                push.apply( results, seed );
                                                return results;
                                        }

                                        break;
                                }
                        }
                }
        }

        // Compile and execute a filtering function if one is not provided
        // Provide `match` to avoid retokenization if we modified the selector above
        ( compiled || compile( selector, match ) )(
                seed,
                context,
                !documentIsHTML,
                results,
                rsibling.test( selector ) && testContext( context.parentNode ) || context
        );
        return results;
};

// One-time assignments

// Sort stability
support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;

// Support: Chrome 14-35+
// Always assume duplicates if they aren't passed to the comparison function
support.detectDuplicates = !!hasDuplicate;

// Initialize against the default document
setDocument();

// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
// Detached nodes confoundingly follow *each other*
support.sortDetached = assert(function( div1 ) {
        // Should return 1, but returns 4 (following)
        return div1.compareDocumentPosition( document.createElement("div") ) & 1;
});

// Support: IE<8
// Prevent attribute/property "interpolation"
// http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
if ( !assert(function( div ) {
        div.innerHTML = "<a href='#'></a>";
        return div.firstChild.getAttribute("href") === "#" ;
}) ) {
        addHandle( "type|href|height|width", function( elem, name, isXML ) {
                if ( !isXML ) {
                        return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
                }
        });
}

// Support: IE<9
// Use defaultValue in place of getAttribute("value")
if ( !support.attributes || !assert(function( div ) {
        div.innerHTML = "<input/>";
        div.firstChild.setAttribute( "value", "" );
        return div.firstChild.getAttribute( "value" ) === "";
}) ) {
        addHandle( "value", function( elem, name, isXML ) {
                if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
                        return elem.defaultValue;
                }
        });
}

// Support: IE<9
// Use getAttributeNode to fetch booleans when getAttribute lies
if ( !assert(function( div ) {
        return div.getAttribute("disabled") == null;
}) ) {
        addHandle( booleans, function( elem, name, isXML ) {
                var val;
                if ( !isXML ) {
                        return elem[ name ] === true ? name.toLowerCase() :
                                        (val = elem.getAttributeNode( name )) && val.specified ?
                                        val.value :
                                null;
                }
        });
}

// EXPOSE
if ( typeof define === "function" && define.amd ) {
        define(function() { return Sizzle; });
// Sizzle requires that there be a global window in Common-JS like environments
} else if ( typeof module !== "undefined" && module.exports ) {
        module.exports = Sizzle;
} else {
        window.Sizzle = Sizzle;
}
// EXPOSE

})( window );