dojo 的方法回调

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
  <head> 
    <title>编辑节点</title>
    <link rel="stylesheet" type="text/css" href="css/style.css" />
    <s:head theme="ajax"/>
  </head> 
  <body>
       <script type="text/javascript" src="js/dojo.js"></script>
       <script type="text/javascript">
         //加载dojo
         dojo.require("dojo.io.*");
         dojo.require("dojo.event.*");
         //使用dojo发送异步请求
         function startrequest()
         {
            dojo.byId("result").innerHTML="数据请求中...";
            dojo.io.bind
            (
               {                  
                   url:"treetable.action",
                   method:"POST",
                   load:function(type,data,e){handleData(data)},
                   mimetype:"text/html",
                   formNode:"form1"
               }
            );         
         }
                           
         function handleData(data)
         {
            alert("响应数据"+data);
            var result=dojo.byId("result");
            result.innerHTML=data;
         }
         
         //绑定事件
         dojo.addOnLoad
         (
            function()
            {
               var addid=dojo.byId("save");
               dojo.event.connect(addid,"onclick",startrequest);
            }
         );
         
       </script>
       <s:tabbedPanel id="bianjijiedain" theme="simple" doLayout="true" cssStyle="width:500px;height=500px;" >
           <s:div theme="ajax" label="添加">
              <div id="result"></div>
              <!-- 添加节点 -->
              <form id="form1" action="">
               <table>
                  <tr><td colspan="2" class="STYLE1">基本信息</td></tr>
                  <tr><td class="STYLE1">名称</td><td><input type="text" name="name"/></td></tr>
                  <tr><td class="STYLE1">上级名称</td><td><input type="text" name="shangji"/></td></tr>
                  <tr><td class="STYLE1">备注</td><td><input type="text" name="beizhu"/></td></tr>
                  <tr><td class="STYLE1">顺序号</td><td><input type="text" name="shunxu"/></td></tr>
                  <tr><td class="STYLE1">创建时间</td><td><input type="text" name="shijian"/></td></tr> 
                  <tr><td class="STYLE1">创建人</td><td><input type="text" name="chuangjian"/></td></tr>
                  <tr><td class="STYLE1" colspan="2">权限信息</td></tr>  
                  <tr><td class="STYLE1">管理者</td><td><input type="text" name="mangerren"/></td></tr>
                  <tr><td class="STYLE1">查询者</td><td><input type="text" name="searchrren"/></td></tr>
                  <tr> 
                      <td colspan="2"><input type="button" value="保存" id="save"/></td>
                      <td colspan="2"><input type="button" value="保存并新建" id="saveandcreate"/></td>
                      <td colspan="2"><input type="button" value="关闭" id="close"/></td>
                  </tr>                 
               </table>
             </form>
           </s:div>           <s:div theme="ajax" label="删除">
           </s:div>           <s:div theme="ajax" label="修改">
           </s:div>
       </s:tabbedPanel>
  </body>
</html>
--------------------------------------------------------------
 function handleData(data)
         {
            alert("响应数据"+data);
            var result=dojo.byId("result");
            result.innerHTML=data;
         }
在请求完之后这个方法为生命没有被调用？？