ajaxFormSubmit

      (function ($) {
          $.fn.ajaxFormSubmit = function (options) {

              var settings = $.extend({
                  alertContainer: '',
                  callback: null
              }, options);
              if (typeof admin_url === 'undefined')
                  return this;
              var fields = $(this).find('input, select, textarea').not(':disabled');
              $(this).ajaxForm({
                  dataType: 'json',
                  beforeSubmit: function (selectorData, selector, options) {

                      $(selector).find('*[type=submit]')
                              .removeClass('btn-danger shake')
                              .attr('disabled', '')
                              .html('Enviando <i class="fa fa-spinner fa-spin"></i>');
                      $(fields).attr({disabled: 'disabled'});
                  },
                  success: function (response, statusText, xhr, selector) {
                      $(selector).find('*[type=submit]')
                              .removeClass('btn-danger shake')
                              .removeAttr('disabled');
                      $(fields).removeAttr('disabled');
                      $(settings.alertContainer).empty();
                      if (response.success === true) {
                          $(selector).find('*[type=submit]')
                                  .addClass(' btn-success')
                                  .html('Éxito <i class="fa fa-check"></i>');
                          $(settings.alertContainer).bootstrapAlert({
                              type: 'success',
                              message: '<strong>Éxito:</strong> ' + response.data[0].message
                          });
                          $(selector)[0].reset();
                      } else {
                          $(selector).find('*[type=submit]')
                                  .addClass('btn-danger shake')
                                  .html('Datos incorrectos <i class="fa fa-warning"></i>');
                          $(settings.alertContainer).bootstrapAlert({
                              type: 'danger',
                              message: '<strong>Error:</strong> ' + response.data[0].message
                          });
                      }

                      if (typeof settings.callback === 'function') {
                          settings.callback(this, response);
                      }
                  }
              });
              return this;
          };
      })(jQuery);

gistfile1.js

$('#test-form').ajaxFormSubmit({
	alertContainer: '#alert-container',
        callback: function (this, response) {
		return null;
        }
});