sfHover = function() {

        var sfEls = document.getElementById("nav-primary").getElementsByTagName("LI"); 
        for (var i=0; i<sfEls.length; i++) {

            sfEls[i].onmouseover=function() {

                this.className+=" sfhover"; 
                this.style.zIndex=500; 

            } 
            sfEls[i].onmouseout=function() {

                this.className=this.className.replace(new RegExp(" sfhover\\b"), ""); 
                this.style.zIndex=0; 

            } 

        } 

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