function empty_form(form)
{
  form.cognome.value = '';
  form.nome.value = '';
  form.email.value = ''; 
	form.citta.value = '';
  form.indirizzo.value = '';
  form.numero.value = '';	
	form.provincia.value = '';
  form.cap.value = '';
  form.telefono.value = '';
  form.cellulare.value = '';	
  form.fax.value = '';
  form.richiesta.value = '';
  form.condizioni.checked = false;
	form['op-type'].value = 'update';
	form.submit();
}