Element.extend({
	hide: function(){
	    return this.setStyle('display', 'none');
	},
	show: function() {
	    return this.setStyle('display', '');
	}
});

var DropdownMenu = new Class({	
	initialize: function(element){
	    $A($(element).childNodes).each(function(el){
		    if(el.nodeName.toLowerCase() == 'li'){
			$A($(el).childNodes).each(function(el2){
				if(el2.nodeName.toLowerCase() == 'ul'){
				    $(el2).hide();
				    el.addEvent('mouseover', function(){
					    el2.show();
					    return false;
					});
				    el.addEvent('mouseout', el2.hide.bind(el2));
				    new DropdownMenu(el2);
				}
			    });
		    }
		});
	    return this;
	}
    });