window.addEvent('domready', function() {

	var topMenuItems = $$('#navbar ul li');

	topMenuItems.each(function(el) {
		// Add mouseover event to all top level menu items
		el.addEvent('mouseover', function(e) {
			this.getChildren().each(function(se) {
				if (se.hasClass('submenu')) {
					se.setStyle('display', 'block');
				}
			});
		});
		// Add mouseout event to all top level menu items
		el.addEvent('mouseout', function(e) {
			this.getChildren().each(function(se) {
				if (se.hasClass('submenu')) {
					se.setStyle('display', 'none');
				}
			});
		});
	});

});