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);

// Open new pop-up window with url, width and height
function open_window(url,width,height) {
  var left = (window.screen.width - width) / 2;
  var top = (window.screen.height - height) / 2;
  var parameters = 'left=' + left + ',top=' + top + ',width=' + width + ',height=' + height + ',toolbar=0,menubar=0,location=0,status=0,scrollbars=no,scrolling=no,resizable=0';
  window.open(url,'login',parameters);
}