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