sfHover = function() {
	var sfEls_id = document.getElementById("wrapper");
	if (!sfEls_id) return false;
	
	var sfEls = sfEls_id.getElementsByTagName("span");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" hover";
		};
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" hover\\b"), "");
		};
	}
};
if (window.attachEvent) window.attachEvent("onload", sfHover);