sfHover = function() {
    if (!document.getElementsByTagName) return false;
    var sfEls =document.getElementById("nav").getElementsByTagName("li");
    for (var i=0; i<sfEls.length; i++) {
        sfEls[i].onmouseover=function() {
            this.className+=" sfhover";
            this.style.zIndex=8200; //this line added to force flyout to be above relatively positioned stuff in IE
        }
        sfEls[i].onmouseout=function() {
            this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
        }
    }
}

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