public void render() {
    String[] cardChoices = {"Maestro", "Mastercard", "Visa"};
    card = new JComboBox(cardChoices);
    
    cardNumber = new JTextField();
    expiraryDate = new JTextField();
    
    
    
    
    JPanel form = new JPanel(new CardLayout());
    //form.add(card, BorderLayout.PAGE_START);
    //form.add(cardNumber, BorderLayout.PAGE_START);
    //form.add(expiraryDate, BorderLayout.PAGE_START);
    //form.add(new JLabel("Number of tickets: " + gui.num ), BorderLayout.CENTER);
    //form.add(new JLabel("Artist: " + gui.chosenEvent.getPerformer()), BorderLayout.CENTER);
    //form.add(new JLabel("Total Due: " + gui.chosenEvent.getTicketPrice() * gui.num), BorderLayout.CENTER);    
    
    form.add(card, BorderLayout.PAGE_START);
    form.add(cardNumber, BorderLayout.CENTER);
    form.add(expiraryDate, BorderLayout.CENTER);
    
    addMainComponent(form);
    
  }