function test_dzial(form) {
    Item = form.dzial.selectedIndex;
    if (Item == 0)
        document.getElementById('form_uslugi').style.display='block';
    else
        document.getElementById('form_uslugi').style.display='none';

    if (Item == 3)
        document.getElementById('form_praca').style.display='block';
    else
        document.getElementById('form_praca').style.display='none';
}