function getElementsByClass(node, searchClass, tag) {
	var classElements = new Array();
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("\b"+searchClass+"\b");
	
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	
	return classElements;
}

sfHover = function() {
	var sfEls = getElementsByClass(document, "primary-navigation", "*");
	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);