donations.js

braintree.onSubmitEncryptForm($form, function(event) {
  disableSubmitButton(true);
  event.preventDefault();

  var payment = Payment($form.serialize());
  payment.save(function() {
    // Success
    window.location = payment.thank_you_url;
  }, function() {
    // Failure
    var failureMessage = 'Payment failed';

    $form
      .attr('action', data.retry_order_url)
      .append(failureMessage);
  });
});