// version 0.1
var mooMenu = new Class({				
	initialize: function(menu){
		this.menu = $(menu);
		(this.elements = this.menu.getElements('li ul')).each(function(element){
			element.setStyle('display', 'none');
			element.getParent().addEvents({
				'mouseenter': function(e){ element.setStyle('display', ''); },
				'mouseleave': function(e){ element.setStyle('display', 'none'); }
			});
		}, this);
	}
});