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);