[PHP & MYSQL] LoginScript?

[Blakkeight]

PHP-Code:

if($main=="login"){
    if($_REQUEST['send']){
        $sql=mysql_query("SELECT ID, user, passwort, email FROM ".$db."_userlog WHERE user='".$_REQUEST['name']."';");
        if($sql){
            $row=mysql_fetch_array($sql);
            if($_REQUEST['passwort']=$row['passwort']){
                session_register('session_name');
                session_register('session_pass');
                session_register('session_email');
                session_register('session_logonoff');
                $session_name=$row['user'];
                $session_pass=$row['passwort'];
                $session_email=$row['email'];
                $session_logonoff=1;
                if($session_name==$row['user']){
                    if($session_pass==$row['passwort']){
                        echo"<a href='' target='_blank'>Weiter zum ACP</a>";
                    }
                }
            }else{echo("Passwort Falsch!");}
        }else{echo("Keinen User gefunden!");}
    }
}elseif($main=="adminlog"){
    echo"<form action='index.php?main=login' method='post'>
        <table id='login'>
            <tr><td>Name:</td><td><input id='login' name='name' type='name'></td></tr>
            <tr><td>Passwort:</td><td><input id='login' name='passwort' type='password'></td></tr>
            <tr><td></td><td><input id='login' name='send' type='submit' value='&nbsp; Login &nbsp;'></td></tr>
        </table>
    </form>";
} 

so sieht meine Login.php aus.