sfHover = function() {
	if (!document.getElementsByTagName) return false;
	var sfEls = document.getElementById("nav-header");
	if(sfEls) {
		sfEls=sfEls.getElementsByTagName("li");
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=" hover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" hover\\b"), "");
			}
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);