window.addEvent('domready', function() {
	var els = $(document.body).getElements('#menu li.level1_parent');
	els.each(function(item){
		var ul = item.getElement('ul');
		var new_height = ul.getElements('li').length * 36;
		var fx = new Fx.Styles(item.getElement('div'), {duration: 200, wait: false});
		item.addEvent('mouseover', function(e) {
			e = new Event(e);
			fx.start({
				'height': [new_height]
			});
			e.stop();
			item.getElement('a').addClass('active');
		});
		item.addEvent('mouseout', function(e) {
			e = new Event(e);
			fx.start({
				'height': 0
			});
			e.stop();
			item.getElement('a').removeClass('active');
		});
	});
});