browser=navigator.appName;
details=navigator.userAgent;

//Version

if (browser.substring(0,4) == "Micr")
{
var a=details.indexOf("MSIE") +5 ; var b=a+3;
	if (details.substring(a,b)>="5.5")
	{
		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);
	}
}