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();
								el.addClass('lihover');
								return false;
							});
							el.addEvent('mouseout', function() {
								el.removeClass('lihover');
								el2.hide();
							});
							new DropdownMenu(el2);
							el2.removeClass('hide');
						}
					});
				}
			});
			return this;
		}
	});

	window.addEvent('domready', function() {
		new DropdownMenu($('nav'))
	});