使用JS实现页面中动态添加文件上传输入项

1. 编写JSP

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 3 <html>
 4 <head>
 5     <title>My JSP 'upload2.jsp' starting page</title>
 6     <script type="text/javascript“ src="js/test.js"></script>
 7 </head>
 8 <body>
 9     <table>
10         <tr>
11             <td>上传用户：</td>
12             <td><input type="text" name="username"></td>
13         </tr>
14         <tr>
15             <td>上传文件：</td>
16             <td><input type="button" value="添加上传文件" onclick="addinput()"></td>
17         </tr>
18         <tr>
19             <td></td>
20             <td>
21                 <div id="file">
22 
23                 </div>
24             </td>
25         </tr>
26     </table>
27 </body>
28 </html>

2. 编写JavaScript

test.js

 1 function addinput(){
 2     var div = document.getElementById("file");
 3 
 4     var input = document.createElement("input");
 5     input.type="file";
 6     input.name="filename";
 7 
 8     var del = document.createElement("input");
 9     del.type="button";
10     del.value="删除";
11     del.onclick = function d(){
12         this.parentNode.parentNode.removeChild(this.parentNode);
13     }
14 
15 
16     var innerdiv = document.createElement("div");
17 
18 
19     innerdiv.appendChild(input);
20     innerdiv.appendChild(del);
21 
22     div.appendChild(innerdiv);
23 }

3. 效果演示

 

posted on 2018-08-26 14:45  ert999  阅读(3029)  评论(0)  编辑  收藏  举报

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