startList = function() {
    if (document.all && document.getElementById) {

        if (document.getElementById("topmenu")) {
            navRoot = document.getElementById("topmenu");
            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;