求动态添加structs标签代码

在jsp页面上有一个按钮，点击一下添加一个<s:file>控件，如何实现？

解决方案 »

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Jquery:<body>
<input type="button" id="btn"/><script>
$(document).ready(function() {
$("#btn").click(function() {
var str = "<s:file ............. />"
$(this).after(str);
});
});
</script>
</body>
简单示意。。
至于JS。好久不用了。。忘记怎么写了JQUERY王道
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib  prefix="s" uri="/struts-tags"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>

    <title>My JSP 'upload.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

<script type="text/javascript">
function addmore(){
var td=document.getElementById("more");
var br=document.createElement("br");
var file=document.createElement("input");
var button=document.createElement("input");
file.type="file";
file.name="file";
button.type="button";
button.value="remove";
button.onclick=function(){
td.removeChild(br);
  td.removeChild(file);
   td.removeChild(button);
}

td.appendChild(br);
td.appendChild(file);
td.appendChild(button);
}
</script>
  </head>

  <body>
    <s:form action="upload" theme="simple" enctype="multipart/form-data" method="post">
    <table>
    <tr>
     <td>name</td>
     <td><s:textfield name="name" ></s:textfield></td>
    </tr>
    <tr>
     <td>pass</td>
     <td><s:textfield name="pass" ></s:textfield></td>
    </tr>
    <tr>
     <td>file</td>
     <td id="more"><s:file name="file" /><input type="button" value="more" onclick="addmore();"/></td>
    </tr>
    <tr>
     <td>submit</td>
     <td><s:submit name="submit"></s:submit></td>
    </tr>
    </table>
   </s:form>
  </body>
</html>