function setCreditCard(type)
{
  switch (type)
  {
    case 'Visa': case 'MC': case 'Discover':
      InputCreditCard.beginUpdate();
      InputCreditCard.set_emptyText('0000 0000 0000 0000');
      InputCreditCard.set_transform('CreditCard_VisaMasterCard');
      InputCreditCard.endUpdate();
      break;
    case 'AmEx':
      InputCreditCard.beginUpdate();
      InputCreditCard.set_emptyText('0000 000000 00000');
      InputCreditCard.set_transform('CreditCard_AmEx');
      InputCreditCard.endUpdate();
      break;
  }
}