写的一个比较简单的会员登陆系统，具体功能在完善中，提点意见

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<?php
require_once("conn_inc.php");
?>
<?php
if ($_POST['submit']) {
$user= $_POST['user'];
$pass= $_POST['pass'];
$select_nows="select * from `check` where name='$user' and password ='$pass' and type='1' ";
$query=mysql_query($select_nows);
$userInfo= @mysql_fetch_array($query);
if (!empty($userInfo)) {
if ($userInfo['name']== $user && $userInfo[password]== $pass) {
setcookie("us",$user,time()+3600);
setcookie("pa",$pass,time()+3600);
echo "<mce:script type="text/javascript"><!--
location.href='insert_login.php'
// --></mce:script>";
}
} else {
echo "<mce:script type="text/javascript"><!--
alert('用户名或者密码错误')
// --></mce:script>";
}
}
?>
<form action="" method="POST">
用户名:<input type="text" name="user" size="10">
密码:<input type="password" name="pass" size="10">
<input type="submit" name="submit" value="提交">
</form>