function returnObj(objId){
	objElem = document.getElementById(objId);
	return objElem;
}

function setSource(strSrcId,strSrc){
	objElem = returnObj(strSrcId);
	objElem.src = strSrc;
}

function setStyle(objElemId,strClass){
	//alert(objElemId)
	objElem = returnObj(objElemId);
	objElem.className = strClass;
}

sfHover = function() {
	var sfEls = document.getElementById("topnavDyn").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);