var SlideList = new Class( {
	initialize: function(menu, options) {
		this.setOptions(this.getOptions(), options);
		this.menu = $(menu), this.current = this.menu.getElement('li.current');
		this.menu.getElements('li').each(function(item){
		item.addEvent('mouseover', function(){ this.moveBg(item); }.bind(this));
		item.addEvent('mouseout', function(){ this.moveBg(this.current); }.bind(this));
		item.addEvent('click', function(event){ this.clickItem(event, item); }.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(el, effect){
		this.back.setStyles({left: (el.offsetLeft+2)+'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 + 2],
		width: [this.back.offsetWidth, to.offsetWidth]
	});
	}
	});

	SlideList.implement(new Options);



window.addEvent('domready', function() {
	new SlideList($E('ul', 'fancymenu'), {transition: Fx.Transitions.backOut, duration: 700});
});