function InitTree(Id, sId){
  if (!document.getElementById) return;

  var ul = document.getElementById(Id);
  if (!ul.childNodes || ul.childNodes.length == 0) return;

  var node = document.getElementById(sId)
  if (node != null){
    if (node.childNodes != null || node.childNodes.length >= 1){
      var subul = node.childNodes[1];
      if (subul != null) subul.className = "open";
    }

    //show parentnodes
    while (node.parentNode && node.parentNode.id != Id){
      if (node.nodeName == 'LI') {
        node.parentNode.className = "open";
      }

      node = node.parentNode;
    }
  }

  var a = ul.getElementsByTagName('A');
  for(var i=0;i<a.length;i++){
    a[i].onclick = expandNode;
  }
}

function expandNode(e, node){
  if(!node)node=this;

  // show sibling ul
  var ul = node.nextSibling;
  if (ul != null) ul.className = "open";
}