(function ($) {

Drupal.behaviors.open_framework = {
  attach: function (context, settings) {

   $('#block-system-main').removeClass('block');
   $('div').has('#block-overlay-toggle').removeClass('block');
   $('#block-overlay-toggle').text('Show Block Numbers');

   $('#block-overlay-toggle').toggle(function() {
      $('#block-overlay-toggle').text('Hide Block Numbers');
      $('.block').each(function(index) {
      $(this).prepend('<p class="block-overlay">' + (index + 1) + '</p>');
      });
   }, function() {
      $('p').remove('.block-overlay');
      $('#block-overlay-toggle').text('Show Block Numbers');
      });
  }
}

})(jQuery);