sfHover = function() {
var sfEls = document.getElementById("nav").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"), "");
}
}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);