dtree.js+jquery.js实现的带右击功能的树

此处显示树节点id
         <input type="text" id="jdid" />
         <script type="text/javascript">    
         d = new dTree('d');    
         d.add(0,-1,'My example tree');
         d.add(1,0,'Node 1','examplea1.html');
         d.add(2,0,'Node 2','examplea2.html');
         d.add(3,1,'Node 1.1','examplea3.html');
         document.write(d);    
         </script>
         <!--右键菜单的源-->
         <div class="contextMenu" id="myMenu1">
             <ul>
                 <li id="open">
                     <a href="#" onclick="alert('添加');">添加节点</a>
                 </li>
                 <li id="email">
                     <a href="#" onclick="alert('修改');">修改节点</a>
                 </li>
                 <li id="save">
                     <a href="#" onclick="alert('删除');">删除节点</a>
                 </li>
             </ul>
         </div>
     </body>
     <script>
      //所有div标签class为dTreeNode的绑定此右键菜单
     $('div.dTreeNode').contextMenu('myMenu1', {
      onContextMenu: function(e) {
    
       document.getElementById("jdid").value=$(e.target).attr('id');
       if ($(e.target).attr('id') == ''||!checkRate($(e.target).attr('id')))