function initMenu() {
  	var menu = document.getElementById("menu");
  	var nodes = menu.getElementsByTagName("li");
  	for (i=0; i<nodes.length; i++) {
		node = nodes[i];
		//alert (node.nodeName);
		if (node.nodeName=="LI") {
			node.onmouseover=function() {
				this.className+=" over";
				
  			}
 			node.onmouseout=function() {
 			  	
  				this.className=this.className.replace("over", "");
  				
   			}
   		}
  	}
}