new Form<NotificationTO>(FORM, new CompoundPropertyModel<NotificationTO>(notificationTO));
final AjaxTextFieldPanel sender = new AjaxTextFieldPanel("sender", getString("sender"),
new PropertyModel<String>(notificationTO, "sender"));
sender.addRequiredLabel();
sender.addValidator(EmailAddressValidator.getInstance());
form.add(sender);
final AjaxTextFieldPanel subject = new AjaxTextFieldPanel("subject", getString("subject"),
new PropertyModel<String>(notificationTO, "subject"));
subject.addRequiredLabel();