(function ($) {
  Drupal.behaviors.commentNotify = {
    attach: function (context) {
        
      //check the status of the checkbox after page is loaded
      //is the checkbox checked, show form
      if ($('input[id^=edit-notify]', context).attr('checked') ) {
          $('div[id^=edit-notify-type]', context).show();          
          console.log('show form');
      }
      else  {
          //else hide the form
          $('div[id^=edit-notify-type]', context).hide();
      }      

      //show hide on checkbox on clicks
      $('input[id^=edit-notify]', context).bind('change', function() {          
          //is the checkbox checked, show form
          if ($('input[id^=edit-notify]', context).attr('checked') ) {
              $('div[id^=edit-notify-type]', context).show();              
          }
          else  {
              //else hide the form
              $('div[id^=edit-notify-type]', context).hide();
          }
      });  
    }
  }
})(jQuery);