/**
* Pole: numer NIP
*
* @param boolean $acl
* @param string $fieldname
* @param string $label
* @param mixed $required
* @return void
*/
public function nip($acl = false, $fieldname = 'nip', $label = 'NIP:', $required = null)
{
parent::nip($acl, $fieldname, $label, $required);
$element = $this->getElement($fieldname);
$element->addFilters(array(new Logic_Filter_AlnumToNum()));
}
