var oldClassName = "";
var uls = new Array();
// uls[0] = "top";
uls[0] = "left";

function startList() {
  if (document.all && document.getElementById) {
    for (i=0; i<uls.length; i++) {
      
	  navRoot = document.getElementById(uls[i]);
	  for (j=0; j<navRoot.childNodes.length; j++) {

		node = navRoot.childNodes[j];
        if (node.nodeName=="LI") {
          node.onmouseover=function() {
            oldClassName = this.className;
            this.className+=" over";
          }
          node.onmouseout=function() {
              this.className=oldClassName;
          }
        }
      }
    }
  }
}

window.onload = startList;