var SlideList=new Class({initialize:function(b,c){this.setOptions(this.getOptions(),c);this.menu=$(b),this.current=this.menu.getElement('li.current');this.menu.getElements('li').each(function(a){a.addEvent('mouseover',function(){this.moveBg(a)}.bind(this));a.addEvent('mouseout',function(){this.moveBg(this.current)}.bind(this))}.bind(this));this.back=new Element('li').addClass('background').adopt(new Element('div').addClass('left')).injectInside(this.menu);this.back.fx=this.back.effects(this.options);if(this.current)this.setCurrent(this.current)},setCurrent:function(a,b){this.back.setStyles({left:(a.offsetLeft)+'px',width:(a.offsetWidth)+'px'});(b)?this.back.effect('opacity').set(0).start(1):this.back.setOpacity(1);this.current=a},getOptions:function(){return{transition:Fx.Transitions.sineInOut,duration:500,wait:false,onClick:Class.empty}},clickItem:function(a,b){if(!this.current)this.setCurrent(b,true);this.current=b;this.options.onClick(new Event(a),b)},moveBg:function(a){if(!this.current)return;this.back.fx.custom({left:[this.back.offsetLeft,a.offsetLeft],width:[this.back.offsetWidth,a.offsetWidth]})}});SlideList.implement(new Options);