function get_user_type($username){

  $query    = mysql_query("SELECT * FROM users WHERE login='$username'");
  $row      = mysql_fetch_array($query);

  if(!$row){
    return -1;
    }

    if($row['gosc_id'] == 1){
      return 0;
    }

    if($row['pracownik_id'] == 1){
      return 1;
    }

    if($row['admin_id'] == 1){
      return 2;
    }
}