function showSalary()
{
  if(!isset($_SESSION['zalogowany'])){
    $this->setMessage('Najpierw musisz si zalogowa.');
    return ACTION_FAILED;
  }
  
  if(!isset($_REQUEST['userid'])){
    $this->setMessage('Nieprawidowe wywoanie.');
    return ACTION_FAILED;
  }
  
  $userid = intval($_REQUEST['userid']);
  
  $query = "SELECT rok, miesiac, suma, data_wyplaty "
         . "FROM wynagrodzenia WHERE " 
         . "pracownik_id = $userid ORDER BY data_wyplaty LIMIT 12";

  if(!($result = $this->dbo->query($query)) || 
     !($dane  = $result->fetchAll())){
    $dane = array();
  }
  
  $this->numberToMonth($dane, 'miesiac');
  
  $message = $this->getMessage();
  $user = $_SESSION['zalogowany']['Nazwa'];
  
  include 'tmpl/salary.tpl.php';
  return ACTION_OK;
}