(function($,undefined){function Slider(slider,container,active){var $slider=this.$slider=$(slider);var $container=this.$container=$(container);var $items=$container.children();this.length=0;Array.prototype.push.apply(this,$items.get());var itemOuterWidth=$items.outerWidth(true);var sliderWidth=$slider.width();var gutterWidth=itemOuterWidth- $items.width();var span=this.span=Math.floor((sliderWidth+ gutterWidth)/itemOuterWidth);this.active=0;this.end=Math.max(0,span*(Math.ceil($items.length/span)- 1));this.pages=Math.ceil(this.length/span);this.activate(active,false);}
$.extend(Slider.prototype,{scrollTo:function(index,animate){if(index<0){index=0;}else if(index>this.length- 1){index=this.end;}
if(index==this.active){return;}
this.active=index;this.activePage=Math.floor(index/this.span)
var $slider=this.$slider;$slider.trigger('scrollstart');this.$container.animate({left:-$(this[index]).position().left},animate?undefined:0,function(){$slider.trigger('scrollend');});},activate:function(index,animate){this.scrollTo(Math.floor(index/this.span)*this.span,animate);}});var defaults={container:'.container',pagination:'.pagination',prev:'.prev',next:'.next',num:'.num',disabledClass:'disabled',activeClass:'active',active:0};$.fn.slider=function(method){var args=arguments;return this.each(function(i,slider){var $slider=$(slider);var slider;if(slider=$slider.data('slider')){args=Array.prototype.slice.call(args,1);switch(method){case'activate':slider[method].apply(slider,args);break;}}else{if(typeof method!='object'){return;}
var o=$.extend({},defaults,method);slider=new Slider($slider,$(o.container,$slider),o.active);$slider.data('slider',slider);var $pagition=$(o.pagination,$slider);if(slider.end==0){$pagition.addClass(o.disabledClass);}
var $prev=$(o.prev,$pagition).addClass(o.disabledClass);var $next=$(o.next,$pagition);$.each([$prev,$next],function(i,$button){$button.click(function(){slider.scrollTo(slider.active
+(i==0?-1:1)*slider.span,true);});});var $nums=$(o.num,$pagition);var $num=$nums.eq(0);var pageNum=Math.floor(o.active/slider.span);var pages=Math.ceil(slider.length/slider.span);for(var i=0,l=pages- $nums.length;i<l;++i){var $clone=$num.clone();$nums.eq($num.length- 1).after($clone)
$nums=$nums.add($clone);};$nums.eq(pageNum).addClass(o.activeClass);$nums.click(function(){slider.scrollTo($nums.index(this)*slider.span,true);});$slider.bind('scrollstart',function(){if(slider.active<slider.span){$prev.addClass(o.disabledClass);}else{$prev.removeClass(o.disabledClass);}
if(slider.active>=slider.end){$next.addClass(o.disabledClass);}else{$next.removeClass(o.disabledClass);}
$nums.filter('.'+ o.activeClass).removeClass(o.activeClass).end().eq(slider.activePage).addClass(o.activeClass);});}});}})(jQuery);