anchor.diff:  
         tree.draw();
         for (var i=0; i < childNodes.length; i++) {
  -  var childnodeInfo = childNodes[i];
  -  addTreeBranch(ontology_node_id, newNode, childnodeInfo);
  +	  var childnodeInfo = childNodes[i];
  +	  addTreeBranch(ontology_node_id, newNode, childnodeInfo);
         }
       }
       YAHOO.util.Event.addListener(window, "load", init);
  
positive.code: 
        }
      }
  
      function addTreeBranch(ontology_node_id, rootNode, nodeInfo) {
        var newNodeDetails = "javascript:onClickTreeNode('" + nodeInfo.ontology_node_id + "');";
  
negative.code:               showPartialHierarchy();
                for (var i=0; i < respObj.root_nodes.length; i++) {
                  var nodeInfo = respObj.root_nodes[i];
                  
                  //alert("root: " + nodeInfo.ontology_node_name);
                  
                  //var expand = false;
                  addTreeBranch(ontology_node_id, root, nodeInfo);
                }
  