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js 实现动态添加多个附件

2008-06-23 03:59 686 查看
效果图：





代码：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

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

<script type="text/javascript">
function AddMore(){
var more = document.getElementById("file");
var br = document.createElement("br");
var input = document.createElement("input");
var button = document.createElement("input");

input.type = "file";
input.name = "file";

button.type = "button";
button.value = "删除";

more.appendChild(br);
more.appendChild(input);
more.appendChild(button);

button.onclick = function(){
more.removeChild(br);
more.removeChild(input);
more.removeChild(button);
};
}
</script>
</head>

<body>
<s:form action="upload" method="post" theme="simple" enctype="multipart/form-data">
<table border="1" width="50%">
<tr>
<td>用户名:</td>
<td><s:textfield name="username" label="用户名"></s:textfield></td>
</tr>
<tr>
<td>附件:</td>
<td id="file">
<s:file name="file" label="文件"></s:file>
<input type="button" value="增加附件" onclick="AddMore()">
</td>
</tr>
<tr>
<td colspan="2" align="center">
<s:submit value="提交" ></s:submit></td>
</tr>
</table>
</s:form>
</body>
</html>
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