function prepMenu() {
	navRoot = document.getElementById("nav");
	subNavRoot = document.getElementById("subnav");
	if (document.all && document.getElementById) {
		for (i = 0; i < navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className += "over";
				}
				node.onmouseout = function() {
					this.className=this.className.replace("over", "");
				}
			}
		}
		for (i = 0; i < subNavRoot.childNodes.length; i++) {
			node = subNavRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className += "over";
				}
				node.onmouseout = function() {
					this.className=this.className.replace("over", "");
				}
			}
		}
	}
}