var SlideList = new Class({ 
initialize: function(menu, options) { 
this.setOptions(this.getOptions(), options); 

this.menu = $(menu), this.current = this.menu.getElement('li.dlscurrent'); 

this.menu.getElements('li').each(function(item){ 
item.addEvent('mouseover', function(){ this.moveBg(item); }.bind(this)); 
//item.addEvent('click', function(event){ this.clickItem(event, item); }.bind(this)); 
}.bind(this)); 

this.back = new Element('li').addClass('dlsbackground').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(el, effect){ 
this.back.setStyles({left: (el.offsetLeft)+'px', width: (el.offsetWidth)+'px'}); 
(effect) ? this.back.effect('opacity').set(0).start(1) : this.back.setOpacity(1); 
this.current = el; 
}, 

getOptions: function(){ 
return { 
transition: Fx.Transitions.sineInOut, 
duration: 500, wait: false, 
onClick: Class.empty 
}; 
}, 

clickItem: function(event, item) { 
if(!this.current) this.setCurrent(item, true); 
this.current = item; 
this.options.onClick(new Event(event), item); 
}, 

moveBg: function(to) { 
		if(!this.current) return; 
		this.back.fx.custom({ 
			left: [this.back.offsetLeft, to.offsetLeft], 
			width: [this.back.offsetWidth, to.offsetWidth] 
			}); 
		} 
}); 

SlideList.implement(new Options);