sfHover = function() {
	var agt=navigator.userAgent.toLowerCase();
    var is_major = parseInt(navigator.appVersion);
	var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
	var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );

	if (is_ie6) {
		var sfEls = document.getElementById("nav").getElementsByTagName("LI");
		
		
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=" iehover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" iehover\\b"), "");
			}
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);