window.addEvent('domready', function() {
	var menu_arrows = $$('ul#menu li a span');
	var menu_submenus = $$('ul#menu li ul');
	
	menu_arrows.each(function(element) {
 
		var submenu = element.parentNode.parentNode.getElementsByTagName('ul')[0];
		element.addEvent('click', function(e){
			e = new Event(e);
			
			if(submenu.style.display == 'none') {
				menu_submenus.each(function(element) {
					element.setStyles({'display': 'none'});
					element.parentNode.getElementsByTagName('a')[0].className = '';
				});
				submenu.setStyles({'display': 'block'});
				element.parentNode.className = 'active';
			} else {
				submenu.setStyles({'display': 'none'});
				element.parentNode.className = '';
			}
			
			e.stop();
		});

	});
});