var uls = document.getElementsByTagName('ul');
for (var i = 0; i < uls.length; i++) {
  if (uls[i].parentNode.className.search(/ebene-2/) >= 0) {
    uls[i].parentNode.onmouseover = function() { 
      var childNodes = this.parentNode.childNodes;
      for (var j = 0; j < childNodes.length; j++) {
        if (childNodes[j].nodeName == 'A') {
          childNodes[j].className += (childNodes[j].className ? ' ' : '') + 'mouseover';
          break;
        }
      }
    }

    uls[i].parentNode.onmouseout = function() { 
      var childNodes = this.parentNode.childNodes;
      for (var j = 0; j < childNodes.length; j++) {
        if (childNodes[j].nodeName == 'A') {
          childNodes[j].className = childNodes[j].className.replace(/ ?mouseover$/, '');
          break;
        }
      }
    }
  }
}