paymentGroup.setVerticalLayout(false);
paymentFieldSet.add(paymentGroup);
cardHolder = new TextField("cardHolderName");
paymentFieldSet.add(cardHolder);
cardNumber = new CreditCardField("cardNumber");
paymentFieldSet.add(cardNumber);
cardExpiry = new IntegerField("expiry");
cardExpiry.setSize(4);
cardExpiry.setMaxLength(4);
paymentFieldSet.add(cardExpiry);