javascript 访问treeview的节点

想在客户端根据treenode写一个事件，缺不知怎么得到treenode。找了半天，终于在msdn找到

<script >

var nodeindex = document.all.treeview1.selectedNodeIndex;

var myNode = treeview1.getTreeNode(nodeindex);

myNode.getAttribute(“text“);

</script>

reference http://msdn.microsoft.com/library/default.asp?url=/workshop/webcontrols/overview/treeview.asp