proxyAddEvent(window, "load", modClass1);

function proxyAddEvent(obj, event, func) {
   if (obj.addEventListener) {
		   obj.addEventListener(event, func, false);
   } else if (obj.attachEvent) {
		   obj.attachEvent("on" + event, func);
   }
}

function modClass1(){
	if( !document.getElementById || !document.getElementsByTagName) return false;
	var container = document.getElementById("bottom_ul");
	container.childNodes[0].className ="first";
}