navHover = function() {
    if (document.getElementById("navmenu-h") != null) {
        var lis = document.getElementById("navmenu-h").getElementsByTagName("LI");
        for (var i = 0; i < lis.length; i++) {
            lis[i].onmouseover = function() {
                this.className += " iehover";
            }
            lis[i].onmouseout = function() {
                this.className = this.className.replace(new RegExp(" iehover\\b"), "");
            }
        }
    }
}
if (window.attachEvent) window.attachEvent("onload", navHover);