javascript:reloadCode()没效果，刷新不了验证码，第一次会出现验证码,servlet的url-pattern:/ImageServlet
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>用户注册页面</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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
body {
background-image: url(images/scenery.jpg);
background-repeat: no-repeat;
background-size: cover;
}
div {
margin-top: 80px;
}
td,th {
border:1px dashed yellow;
}
</style>
<script type="text/javascript" src="js/Calendar3.js"></script>
<script type="text/javascript">
function reloadCode(){
var time = new Date().getTime();
alert("<%=path%>/ImageServlet?d="+time);
alert(document.getElementById("imageCode").src);
document.getElementById("imagecode").src="<%=request.getContextPath() %>/ImageServlet?d="+time;
}
</script>
</head>
<body>
<center><h1><font face="华文行楷" color="#ff0080" size="6">用户免费注册</font></h1></center><hr>
<div>
<%-- <form action="<%=path%>/RegisterServlet" method="post"> --%>
<form action="<%=path%>/RegisterServlet" method="post">
<table align="center" width="420" height="250" cellpadding="2" cellspacing="2" border="0">
<tr>
<td align="right">用户名</td>
<td align="center"><input type="text" name="username" /></td>
</tr>
<tr>
<td align="right">密码</td>
<td align="center"><input type="password" name="password" /></td>
</tr>
<tr>
<td align="right">确认密码</td>
<td align="center"><input type="password" name="password2" /></td>
</tr>
<tr>
<td align="right">性别</td>
<td align="center">
<input type="radio" name="gender" value="男" checked="checked"/>男
<input type="radio" name="gender" value="女"/>女
</td>
</tr>
<tr>
<td align="right">注册邮箱</td>
<td align="center"><input type="text" name="email" /></td>
</tr>
<tr>
<td align="right">兴趣爱好</td>
<td align="center">
<input type="checkbox" name="interests" value="read"/>看书
<input type="checkbox" name="interests" value="online"/>上网
<input type="checkbox" name="interests" value="shopping"/>购物
<input type="checkbox" name="interests" value="programing"/>编程
</td>
</tr>
<tr>
<td align="right">生日</td>
<td align="center">
<input type="text" name="birthday" value="选择日期" onclick="new Calendar().show(this);" readonly="readonly"/>
</td>
</tr>
<tr>
<td align="right">是否接受条款</td>
<td align="center">
<input type="radio" name="isAccept" value="接受" checked="checked"/>接受
<input type="radio" name="isAccept" value="不接受" />不接受
</td>
</tr>
<tr>
<td align="right">验证码</td>
<td align="center">
<input type="text" name="checkCode" id="imageCode" size="6"/>
<img alt="验证码" src="<%=path%>/ImageServlet"/>
<a href="javascript: reloadCode();">看不清</a>
</td>
</tr>
<tr>
<th colspan="2"> </th>
</tr>
<tr>
<th colspan="2">
<input type="submit" name="submit" value="确认提交"/>
<input type="reset" name="reset" value="取消重置"/>
</th>
</tr>
</table>
</form>
</div>
</body>
</html>
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Java
JavaScript