function empty_form(form)
{
  form.cognome.value = '';
  form.nome.value = '';
  form.email.value = '';
  form.citta.value = '';
  form.telefono.value = '';
  form.note.value = '';
  form.condizioni.value = false;
	form['op-type'].value = 'update';
	form.submit();
}