var Menu = {
  start: function () {  
    var menu = $('menu');
    menu.getFirst().getChildren().each(function (el) {
    if (el.getElement('ul')) {
 	     var second_list = el.getElement('ul');
	      second_list.setStyles({
	        'opacity': 0,
	        'height': 300
	      });
	      var fx = second_list.effect('opacity', {'wait': false, 'duration': 200});
	      el.addEvents({
	        'mouseenter': function () {
	          fx.start(1);
	          this.addClass('hover');
	          this.getParent().getParent().setStyle('height', '340px');
	        },
	        'mouseleave': function () {
	          fx.start(0);
	          this.removeClass('hover');
	          this.getParent().getParent().setStyle('height', '34px');
	        }
 	     }); 

		el.getFirst().getFirst().addEvent('click', function(event){
			event.preventDefault();
		});

    }
    });
    menu.setStyle('height', '34px');
  }
};
window.addEvent('domready', Menu.start);