if(isset($_COOKIE['login']) && isset($_COOKIE['pass'])){
	$login = check($_COOKIE['login']);
	$password = check($_COOKIE['pass']);
	$pass = md5(md5($password));
	if(empty($login) or empty($pass)){
		setcookie('login', '', time()-cookie_time, '/');
		setcookie('pass', '', time()-cookie_time, '/');
	}
	$user = $db->prepare('SELECT * FROM `users` WHERE `login` = ? AND `pass` = ? LIMIT 1');
	$user->execute(array($login,$pass));
	$userid = $user->fetch();
	if(isset($userid['id'])){
		if($userid['login']!=$login or $userid['pass']!=$pass){
			setcookie('login', '', time()-cookie_time, '/');
			setcookie('pass', '', time()-cookie_time, '/');
		}
	}
}