rL = function() {
	var lis = document.getElementsByTagName('li');
	for (var i=0; i<lis.length; i++) {
		if (lis[i].className == "nr") {
			lis[i].onmouseover = function() {
				this.className+=" wr";
			}
			
			lis[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" wr\\b"), "");
			}
		}
	}
}

addLoadEvent(rL);