Expand Parent Nodes

function pageLoad()
{
     var tree = $find("<%= RadTreeView1.ClientID %>");
     var node = tree.findNodeByText("The Text Of The Needed Node");
     // or
     //var node = tree.findNodeByValue("The Value Of The Needed Node");  

     node = node.get_parent();

     while(node != null)
    {
      if (node.expand)
      {
       node.expand();
      }

     node = node.get_parent();
    }
}