window.addEvent('domready', function() {
var menus = $$('.menu_nav ul li.activeliste');
var drops = $$('.menu_nav ul li.activeliste ul');
		menus.each(function(menu, i) {	
var dropHeight = drops[i].offsetHeight + 9;
var mySlide = new Fx.Style(drops[i], 'height', {wait:false, duration:500, transition:Fx.Transitions.Quad.easeOut});
mySlide.set(0);
	menu.addEvent('mouseenter', function(e) {
e = new Event(e);
mySlide.start(0,dropHeight);
e.stop();
	});
	menu.addEvent('mouseleave', function(e)	{
e = new Event(e);
mySlide.start(dropHeight,0);
e.stop();
	});
		});
			});