/**
   * @param string elementId
   * @param string nodeId
   */
  var openedRadioTreeNodes = new Array();
  function toggleRadioTree(elementId, nodeId) {
    var newClass = 'open';
    var key = elementId + '-' + nodeId;
    if (openedRadioTreeNodes[key]) {
      newClass = 'closed';
      delete openedRadioTreeNodes[key];
    }
    else {
      openedRadioTreeNodes[key] = 1;
    }
    var node = $(key);
    node.setProperty('class', newClass);
    for (node = node.getNext(); node.nodeName == 'DD'; node = node.getNext()) {
      node.setProperty('class', newClass);
    }
  }