Untitled

<?
    session_start();
    session_register("user");
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Login</title>
    </head>
     <body bgcolor="#666" style="color:#FFF">
        <?php
            require "Functions.php";
            $user=@$_REQUEST['user'];
            if($user!=null)
            {
                $pass=$_REQUEST['pass'];
                //有帳號唷
                //攻擊驗證
                if(!preg_match('/^[A-Za-z0-9]+$/',$user) || !preg_match('/^[A-Za-z0-9]+$/',$pass))
                {
                    //有攻擊!!
                    $url=$GLOBALS['Msg']['AttackAlert'];
                    echo "<script>alert('$url');</script>";
                }else
                {
                    //驗證登入
                    if(VertifyAccount($user,$pass))
                    {
                        $_SESSION['user']=$user;
                        //登入了唷
                        echo "<script>window.location='index.php';</script>";
                    }else
                    {
                        $url=$GLOBALS['Msg']['LoginError'];
                        echo "<script>alert('$url');</script>";
                    }
                }
            }
        ?>
        <form name="RegisterForm" action="Login.php" method="POST">
            <input type="hidden" name="Method" value="create"/>
            <table style="background:#333; color:#FFF; border: 1px solid;">
                 <tr>
                     <td colspan="2"><h1>AtomixECO Login</h1></td>
                 </tr>
                <tr>
                    <td>
                        UserID：
                    </td>
                    <td>
            <input type="text" name="user" value=""/>
            </td>
            </tr>
            <tr>
                <td>
                    Password：
                </td>
                <td>
            <input type="password" name="pass" value=""/>
            </td>
            </tr>
      <tr>
                <td>

            </td>
            <td align="right">
            <input type="submit" value="Login">
            </td>
            </tr>
            </table>
        </form>
    </body>
</html>