l number as threshold value!");
 }
}

function collapseAll(event) {
  event.cancelBubble=true;
  var threads = document.getElementsByName("thread");
  var l = threads.length;
  for ( var i = 0; i < l ; i++ ) {
    hideUL(threads[i]);
  }
  selectNode(rootNode(), null);
}

function expandAll(event) {
  event.cancelBubble=true;
  var threads = document.getElementsByName("thread");
  var l = threads.length;
  for ( var i = 0; i < l ; i++ ) {
    showUL(threads[i]);
  }
}

function toggleHelp(node) {
  var help