sfHover = function() {
    var sfEls = document.getElementById("nav").getElementsByTagName("LI");
    var sfEls1 = document.getElementById("navAlt").getElementsByTagName("LI");
    for (var i = 0; i < sfEls.length; i++) {
        sfEls[i].onmouseover = function() {
            this.className += " sfhover";
        }
        sfEls[i].onmouseout = function() {
            this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
        }
    }

    for (var i = 0; i < sfEls1.length; i++) {
        sfEls1[i].onmouseover = function() {
            this.className += " sfhover";
        }
        sfEls1[i].onmouseout = function() {
            this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
        }
    }

}
if (window.attachEvent) window.attachEvent("onload", sfHover);