window.addEvent('domready', function(){
	$('mainNav').getElements('li.menu').each( function(elem){
		var list = elem.getElement('ul.subNav');
		var myFx = new Fx.Slide(list).hide();
		elem.addEvents({
			'mouseenter' : function(){
				list.setStyle('display', 'block');
				myFx.cancel();
				myFx.slideIn();
			},
			'mouseleave' : function(){
				myFx.cancel();
				myFx.slideOut();
			}
		});
	})
});