var menu_id = "menu"

initMenu = function() {
	
	var nav_items = getElementsBySelector("#" + menu_id + " li");
	
	for (i=0; i<nav_items.length; i++) {
		node = nav_items[i];
		if (node.nodeName=="LI" && node.childNodes.length > 2) {
			node.onmouseover=function() {
				this.className+=" over";
			}
			node.onmouseout=function() {
				this.className=this.className.replace("over", "");
			}
		 }
	}
}

EventUtils.addEventListener(window,'load',initMenu);