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$(document).ready(function(){$(".vt").click( function(){$('.slider').each(function(){if($('li:last',this).width()+$('li:last',this).offset().left-$('li:first',this).offset().left<$('div',this).width()){// enable the buttons$('button',this).css('display','inline');$('button.next',this).css('visibility','hidden');}});});// Enable or leave the keys$('.slider').each(function(){if($('li:last',this).width()+$('li:last',this).offset().left-$('li:first',this).offset().left>$('div',this).width()){// enable the buttons$('button',this).css('display','inline');$('button.prev',this).css('visibility','hidden');}if($('li:last',this).width()+$('li:last',this).offset().left-$('li:first',this).offset().left<$('div',this).width()){// enable the buttons$('button',this).css('display','inline');$('button.next',this).css('visibility','hidden');}$('li:first',this).css("color","#333333");$('li:first',this).css("font-weight","bold");});$('.slider ul li').click(function(){$('li',this.parentNode).css("color","#0066CC");$('li',this.parentNode).css("font-weight","normal");$(this).css("color","#333333");$(this).css("font-weight","bold");});$(".slider .next").click(function(){//Remove the exist selector//Set the width to the widest of eithervar $div =$('div',this.parentNode);var maxoffset = $('li:last',$div).width()+$('li:last',$div).offset().left - $('li:first',$div).offset().left - $div.width();var offset = Math.abs(parseInt( $('ul',$div).css('marginLeft') ));var diff = $div.width();if( offset >= maxoffset ){return;}else if( offset + diff >= maxoffset ){diff = maxoffset - offset + 20;// Hide this$(this).css('visibility','hidden');}// enable the other$('.prev', this.parentNode).css('visibility','visible');$("ul", $(this).parent() ).animate({marginLeft: "-=" + diff},400, 'swing');});$(".slider .prev").click(function(){var offset = Math.abs(parseInt( $('ul',this.parentNode).css('marginLeft') ));var diff = $('div',this.parentNode).width();if( offset <= 0 )return;else if ( offset - diff <= 0 ){$(this).css('visibility','hidden');diff = offset;}$('.next', this.parentNode).css('visibility','visible');$("ul",$(this).parent()).animate({marginLeft: '+='+diff},400, 'swing');});});