var userAgent = navigator.userAgent;
var versionOffset = userAgent.indexOf("MSIE");
var isIE = (versionOffset >= 0);
var isPreIE7 = false;
var fullVersionIE = "";
var majorVersionIE = "";

if (isIE)
{
    fullVersionIE = parseFloat(userAgent.substring(versionOffset+5, userAgent.length));
    majorVersionIE = parseInt('' + fullVersionIE);
    isPreIE7 = majorVersionIE < 7;
}

if (isPreIE7)
{ /*
    sfHover = function() { 
        var sfEls = document.getElementById("ctl00_mnuHeader").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);  */
}