// JavaScript Document
// Pop-up sub-menu
function createSubMenu() {
	navRoot = document.getElementById("nav");
	for (i=0; i<navRoot.childNodes.length; i++) {
		node = navRoot.childNodes[i];
		if (node.nodeName=="TD") {	   
			node.onmouseover=function() { this.className+=" over"; }
			node.onmouseout=function() { this.className=this.className.replace(" over", "_"); }
		}  
	}
	return true;
}