startList = function() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("main_menu");
		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", ""); }
            }
        }
    }
}
window.onload=startList;