activateMenu = function() {
	var navroot = document.getElementById("nav");
	var lis=navroot.getElementsByTagName("DIV");
	for (i=0; i<lis.length; i++) {
		if(lis[i].lastChild.tagName=="TABLE"){
			lis[i].onmouseover=function() {	
				this.lastChild.style.display="block";
				this.className += "nav over";
			}
			lis[i].onmouseout=function() {                       
				this.lastChild.style.display="none";
				this.className = this.className = "nav";
			}
		}
	}
}
if (window.addEventListener)
	window.addEventListener("load", activateMenu, false);
else if (window.attachEvent)
	window.attachEvent("onload", activateMenu);