var startNavigation = function() {
    if (document.all && document.getElementById) {
        navRoot = document.getElementById("navlist");
        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", "");
                }
            }
        }
    }
}

if (window.attachEvent) window.attachEvent("onload", startNavigation);