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"), "");
	  }
	}
	var sfEls2 = document.getElementById("nav2").getElementsByTagName("li");
	for (var i=0; i<sfEls2.length; i++) {
	  sfEls2[i].onmouseover=function() {
	    this.className+=" sfhover";
	  }
	  sfEls2[i].onmouseout=function() {
	    this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
	  }
	}

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