code: function(el) {
  
          var p=el, m, re=/ygtv([^\d]*)(.*)/;
  
          do {
  
              if (p && p.id) {
                  m = p.id.match(re);
                  if (m && m[2]) {
                      return this.getNodeByIndex(m[2]);
                  }
              }
  
              p = p.parentNode;
  
              if (!p || !p.tagName) {
                  break;
              }
  
          } 
          while (p.id !== this.id && p.tagName.toLowerCase() !== "body");
  
          return null;
      }
docs: Returns the treeview node reference for an ancestor element
  of the node, or null if it is not contained within any node
  in this tree.
  @method getNodeByElement
  @param el {HTMLElement} the element to test
  @return {YAHOO.widget.Node} a node reference or null