function activeLeftNavSubMenus(rootnode) {

	var node;
	var nodeCollection;
	var subNodesCollection;
	var subNode;
	
	if (rootnode != null) {
		nodeCollection = rootnode.childNodes;
		if (rootnode.nodeName == "UL" && nodeCollection != null && nodeCollection.length > 0) {
			for (var i=0; i<nodeCollection.length; i++) {
				node = nodeCollection[i];
				if (node.nodeName=="LI") {
					node.onmouseover=function() {
						this.className+=" over";
					}
					node.onmouseout=function() {
						this.className=this.className.replace(" over", "");
					}
	
					subNodesCollection = node.childNodes;
					if (subNodesCollection != null && subNodesCollection.length && subNodesCollection.length > 0) {
						for (var j=0; j<subNodesCollection.length; j++) {
							subNode = subNodesCollection[j];
							if (subNode != null && subNode.nodeName=="DIV" && subNode.hasChildNodes() && subNode.childNodes[0].nodeName=="UL") {
								activeLeftNavSubMenus(subNode.childNodes[0]);
							}
						}
					}
				}
			}

		} else if (rootnode.nodeName == "DIV" && nodeCollection != null) {
			for (var i=0; i<nodeCollection.length; i++) {
				if (nodeCollection[i] && nodeCollection[i].nodeName=="UL") {
					activeLeftNavSubMenus(nodeCollection[i]);
				}
			}
		}
	}
}