📄 login.jsp
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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>memberlogin</title>
<style type="text/css">
<!--
.STYLE1 {
font-family: "宋体";
font-size: 16px;
}
.STYLE2 {font-size: 12px}
.STYLE3 {font-size: 12px}
.STYLE4 {
font-family: "新宋体";
font-size: 14px;
color: #0000FF;
}
-->
</style>
</head>
<script language="JavaScript" type="text/javascript">
function check()
{
if(document.form.username.value == "")
{
alert("用户名不能为空！");
document.form.username.focus();
return false;
}
if(document.form.username.value != "")
{
var patrn=/^[a-zA-Z]{1}(\w){0,19}$/;
if (!patrn.exec(document.form.username.value))
{
alert("用户名只能由字母、数字和下划线组成！必须以字母开头，长度不得超过20个字符！");
return false
}
}
if(document.form.passwd.value == "")
{
alert("密码不能为空！");
document.form.passwd.focus();
return false;
}
if(document.form.passwd.value != "")
{
var patrn=/^(\w){1,20}$/;
if (!patrn.exec(document.form.passwd.value))
{
alert("密码只能由字母、数字和下划线组成！长度为1到20个字符！");
return false
}
}
}
</script>
<body>
<form action="check.jsp" method="post" name="form" id="form" onsubmit="return check(this)">
<p><img src="../src/img/login.png" width="227" height="45" border="0" /></p>
<p><span class="STYLE2">用户名
<label> </label>
</span>
<label>
<input name="username" type="text" id="username" />
</label>
</p>
<p><span class="STYLE3">密码
<label> </label>
</span>
<span class="STYLE3">
<label> </label>
</span>
<span class="STYLE3">
<label> </label>
</span><span class="STYLE3"><label></label>
</span>
<label>
<input name="passwd" type="password" id="passwd" />
</label>
</p>
<p>
<span class="STYLE4">未<a href="sign.jsp">注册</a></span>
<label>
<input name="Submit" type="submit" value="登录" />
</label>
<label>
<input type="reset" name="Submit2" value="重置" />
</label>
</p>
<p> </p>
</form></body></html>⌨️ 快捷键说明
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