sfHover = function() {
	var preSfEls =document.getElementById("gallery");
	if ( preSfEls ) {
		var sfEls = preSfEls.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);