(function Expand(node)
{
  // Change the image (if there is an image)
  if (node.childNodes.length > 0)
  {
    if (node.firstChild.tagName == "IMG")
    {
      node.firstChild.src = "minus.gif";
    }
  }
  node.nextSibling.style.display = '';
}

function Collapse(node)
{
  // Change the image (if there is an image)
  if (node.childNodes.length > 0)
  {
    if (node.firstChild.tagName == "IMG")
    {
      node.firstChild.src = "plus.gif";
    }
  }
 node.nextSibling.style.display = 'none';
}

function Toggle(node)
{
  // Unfold the branch if it isn't visible
  if (node.nextSibling.style.display == 'none')
  {        
      Expand(node);
  }
  // Collapse the branch if it IS visible
  else
  {        
     Collapse(node);
  }
node.childNodes[1].nodeValue = (node.nextSibling.style.display == 'none')? 'More...' : 'Less...';
})(jQuery);