code: function checkAndSend(e) {
    var formName = $(e.currentTarget.parentNode).attr('id');
  
    var email = $('#' + formName + ' [name=ep_email]').val();
  
    if (email && $('#' + formName + ' [name=ep_email_option]').val() == 'subscribe'
        && !$('#' + formName + ' [name=ep_email_onStart]').is(':checked')
        && !$('#' + formName + ' [name=ep_email_onEnd]').is(':checked')) {
      $.gritter.add({
        // (string | mandatory) the heading of the notification
        title: window._('ep_email_notifications.titleGritterError'),
        // (string | mandatory) the text inside the notification
        text: window._('ep_email_notifications.msgOptionsNotChecked'),
        // (string | optional) add a class name to the gritter msg
        class_name: "emailNotificationsSubscrOptionsMissing"
      });
    } else if (email) {
      $('#' + formName).submit();
    }
    return false;
  }
docs: Control options before submitting the form