if (Drupal.jsEnabled) {

  // jQuery magic for partial collapsing/showing GeSHi filter code blocks.
  $(document).ready(function() {
    // The height to collapse to.
    var geshifilter_collapse_height = 100;
    var geshifilter_collapse_height_threshold = 150;

    $('div.geshifilter').each(function() {
      // Get code container and its height.
      var code_container = $(this);
      var code_container_original_height = code_container.height();

      // Only do the collapsing where it makes sense.
      if (code_container_original_height > geshifilter_collapse_height_threshold) {
        // Add more/less link.
        $(this).after('<div class="geshifilter-tools"><a href="#" class="geshifilter-tools-collapsetoggle">' + Drupal.t('Show more code') + '</a></div>');
        // Store the original heights of the geshifilter divs.
        code_container.attr('original_height', code_container_original_height);
        // Collapse by default.
        code_container.addClass('geshifilter-collapsed').css("height", geshifilter_collapse_height);
      }
    });

    // Add handler to read more/collapse link.
    $("a.geshifilter-tools-collapsetoggle").click(function() {
      // Get code container.
      var code_container = $(this).parent().prev();

      if (code_container.hasClass('geshifilter-collapsed')) {
        // Show more (use original height).
        var original_height = code_container.attr('original_height') + 'px';
        code_container.removeClass('geshifilter-collapsed').animate({height: original_height}, 'slow');
        $(this).text(Drupal.t('Show less code'));
      }
      else {
        // Collapse.
        code_container.addClass('geshifilter-collapsed').animate({height: geshifilter_collapse_height}, 'slow');
        $(this).text(Drupal.t('Show more code'));
      }
      // Return false so that the link is no followed.
      return false;
    });
  });
}