<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>登录</title>
<link href="css/bootstrap.min.css" rel="stylesheet"></head><body><nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="./">jsp作业</a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li><a href="login.html">登录</a></li>
</ul>
</div>
</div></nav><div class="container">
<div class="row">
<div class="col-md-4">
</div>
<div class="col-md-4">
<form class="form-signin" target="submitFrame" method="post">
<h2 class="form-signin-heading">登录到jsp作业</h2>
<label for="inputEmail">Email</label>
<input type="email" id="inputEmail" class="form-control" placeholder="请输入Email" required autofocus><br>
<label for="inputPassword">密码</label>
<input type="password" id="inputPassword" class="form-control" placeholder="请输入密码" required>
<div class="checkbox">
<label>
<input type="checkbox" value="remember-me" checked="checked">记住密码</label>
</div>
<button type="submit" class="btn btn-primary" id="btn-login">登录</button>
<a href="reg.html" class="btn btn-default">注册</a>
</form>
<iframe style="display: none" name="submitFrame" src="about:blank"></iframe>
</div>
<div class="col-md-4">
</div>
</div>
<script src="js/jquery.min.js"></script></body></html>
上面给你的是asp的，这边给你个php的，你看下，不懂再问我<?php
include("config.php")
session_start()
/*--------------------删除cookies记录，让cookies过期-----------------------------------*/
if($_GET["del"]=="cookies")
{
setcookie("usercookies", "", time()-3600)
setcookie("pwdcookies", "", time()-3600)
echo "<SCRIPT type=text/javascript>
var n = 5
var timer = setInterval(function() {
n--
document.getElementById('second').innerHTML = n
if (n == 0) {
clearInterval(timer)
window.location = 'login.php'
}
}, 1000)
</SCRIPT>删除成功<br><B class='chengse STYLE1' id=second>5</B>秒后回到首页"
exit()
}
/*------------------------如果判断已经有cookies存在，则进行自动登录 *** 作----------------------------------*/
if($_COOKIE["usercookies"]!="" and $_COOKIE["pwdcookies"]!="")
{
$username=$_POST["username"]
$userpassword=$_POST["userpassword"]
$sql=mysql_query("select * from user where username='$username' and userpassword='$userpassword'")
$rs=mysql_fetch_array($sql)
echo"自动跳转成功"
//exit()
}
/*----------------------------点击登录按钮后的动作act=login----------------------------------*/
if($_GET["act"]=="login")
{
/*------------------判断获取的验证码是否一致-------------------------*/
/*if(strtoupper($_SESSION["vcode"])!=strtoupper($_POST["Code"]))
{
echo("<script type='text/javascript'>alert('对不起，验证码错误！')location.href='javascript:onclick=history.go(-1)'</script>")
exit()
}*/
/*------------------------点击登录按钮后如果判断已经有cookies存在，则进行自动登录 *** 作----------------------------------*/
if($_COOKIE["usercookies"]!="" and $_COOKIE["pwdcookies"]!="")
{
$username=$_POST["username"]
$userpassword=$_POST["userpassword"]
$sql=mysql_query("select * from user where username='$username' and userpassword='$userpassword'")
$rs=mysql_fetch_array($sql)
if($_POST["username"]==$rs["username"] and $_POST["userpassword"]==$rs["userpassword"])
{
echo"<script type='text/javascript'>alert('存在cookies登录跳转成功！')location.href='javascript:onclick=history.go(-1)'</script>"
exit()
}
else
{
echo"<script type='text/javascript'>alert('存在cookies登录跳转失败！')location.href='javascript:onclick=history.go(-1)'</script>"
exit()
}
exit()
}
/*-------------------点击登录后判断cookies不存在则进行登录比较用户名密码------------------------------*/
$username=$_POST["username"]
$userpassword=md5($_POST["userpassword"])
$sql=mysql_query("select * from user where username='$username' and userpassword='$userpassword'")
if($rs=mysql_fetch_array($sql))
{
/*---------------------用户名密码判断正确，写入cookies动作，同时进行跳转------------------------------------*/
setcookie("usercookies", $_POST["username"], time()+3600*48)
setcookie("pwdcookies", md5($_POST["userpassword"]), time()+3600*24)
header('Location: http://www.baidu.com/')
exit()
}
else
{
/*-------------------判断用户名密码错误，d出错误提示---------------------------*/
echo "<script type='text/javascript'>alert('用户名或密码错误，请重新输入！')location.href='javascript:onclick=history.go(-1)'</script>"
exit()
}
}
/*
$user_IP = $_SERVER["REMOTE_ADDR"]//获取访问者IP
$file_name=date('Y-m-d').'.txt'//以当前的日期建立txt文件
$file=fopen($file_name,"a+")//如果存在该文件就打开，如果不存在就创建
fwrite($file,$user_IP.'--'.date('Y-m-d H:i:s')."\r\n")//将访问者IP及当前时刻写到文件最后,\r\n在文档最后换行
fclose($file)//关闭文件
*/
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/htmlcharset=gb2312" />
<title>COOKIES判断是否自动登录</title>
</head>
<body>
<form action="?act=login" method="post">
<input name="username" type="text" id="username" value="<?php if($_COOKIE["usercookies"]!=""){echo $_COOKIE["usercookies"]}?>" />
<input name="userpassword" type="password" id="userpassword" value="<?php if($_COOKIE["pwdcookies"]!=""){echo $_COOKIE["pwdcookies"]}?>"/>
<!--<img src="yanzhengma_class.php" title="看不清楚?请点击刷新验证码" onClick="this.src='yanzhengma_class.php?t='+(new Date().getTime())" height="20px"><input name="Code" type="text" id="Code" value="" />-->
<input name="" type="submit" />
</form>
<a href="?del=cookies">删除cookies</a>
</body>
</html>
<script>function check(){
var name=document.getElementById("name").value
var pass=document.getElementById("pass").value
if(name=="a" &&pass=="a"){
alert("登入成功")
window.document.f.action="b.html"
window.document.f.submit()
}else{
alert("用户名或密码错误")
}
}
</script>
<form name="f" action="">
用户名:<INPUT TYPE="text" NAME="" id="name"><br>
密码:<INPUT TYPE="password" NAME="" id="pass"><br>
<INPUT TYPE="button" value="登入" onclick="check()"><INPUT TYPE="reset" value="重置">
</form>
不知道能不能符合你的要求 若有不足的地方请谅解和指导 呵呵
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