function addMouseHandler(e) {
	var node;
	for (var i=0; i<e.childNodes.length; i++) {
		node = e.childNodes[i];
		//debug(node.nodeName);
		if (node.nodeName=="LI") {
			//debug("depth: " + depth + ",  node:" + i);
			if (node.childNodes.length>1) {
				if (node.childNodes[1].nodeName=="UL") {
				
					node.onmouseover=function() { 
						this.childNodes[1].style.display="block"; 
					}
					
					node.onmouseout=function() { 
						this.childNodes[1].style.display="none"; 
					}
					
					addMouseHandler(node.childNodes[1]);
				}
			}
		}
	}
}

function initPopup(menuID) {
	// if IE....
	if ((navigator.appName.indexOf("Microsoft Internet Explorer")!=-1) && (navigator.userAgent.indexOf("Opera")==-1)) {
		addMouseHandler(document.getElementById(menuID));
	}
}