function customMenuPrincipal() {
	if($('nav')) {
		$$('#nav ul').each(function(s) {
			if(s.parentNode.nodeName == 'LI') {
				s.previousSibling.href="javascript:void(0);";
				s.previousSibling.onclick = function(a) {
					$$('#nav ul').each(function(u) {
						u.className = '';
					});	
					this.nextSibling.className = 'open';
				}
			}
		});		
	}
}


/****************************************************/
/*				INITIALISATION DE LA PAGE			*/
/****************************************************/
function addLoadListenerPage(func) {
	if (window.addEventListener) {
		window.addEventListener("load", func, false);
	} else if (document.addEventListener) {
		document.addEventListener("load", func, false);
	} else if (window.attachEvent) {
		window.attachEvent("onload", func);
	}
}

if (document.getElementById && document.createTextNode) {
	addLoadListenerPage(function() {
		customMenuPrincipal();
	});
}