text: 
  /**
   * Toggle the visibility of a fieldset using smooth animations
   */
  Drupal.toggleFieldset = function(fieldset) {
    if ($(fieldset).is('.collapsed')) {
      // Action div containers are processed separately because of a IE bug
      // that alters the default submit button behavior.
      var content = $('> div:not(.action)', fieldset);
      $(fieldset).removeClass('collapsed');
      content.hide();
      content.slideDown( {
        duration: 'fast',
        easing: 'linear',
        complete: function() {
          Drupal.collapseScrollIntoView(this.parentNode);
          this.parentNode.animating = false;
          $('div.action', fieldset).show();
        },
        step: function() {
          // Scroll the fieldset into view
          Drupal.collapseScrollIntoView(this.parentNode);
        }
      });
    }
    else {
      $('div.action', fieldset).hide();
      var content = $('> div:not(.action)', fieldset).slideUp('fast', function() {
        $(this.parentNode).addClass('collapsed');
        this.parentNode.animating = false;
      });
    }
  };
  
  /**
   * Scroll a given fieldset into view as much as possible.
   */
  Drupal.collapseScrollIntoView = function (node) {
    var h = self.innerHeight || document.documentElement.clientHeight || $('body')[0].clientHeight || 0;
    var offset = self.pageYOffset || document.documentElement.scrollTop || $('body')[0].scrollTop || 0;
    var posY = $(node).offset().top;
    var fudge = 55;
    if (posY + node.offsetHeight + fudge > h + offset) {
      if (node.offsetHeight > h) {
        window.scrollTo(0, posY);
      } else {
        window.scrollTo(0, posY + node.offsetHeight - h + fudge);
      }
    }
  };
  
  Drupal.behaviors.collapse = function (context) {
    $('fieldset.collapsible > legend', context).each(function() {
      var fieldset = $(this.parentNode);
      // Expand if there are errors inside
      if ($('input.error, textarea.error, select.error', fieldset).size() > 0) {
        fieldset.removeClass('collapsed');
      }
  
      // Turn the legend into a clickable link and wrap the contents of the fieldset
      // in a div for easier animation
      var text = this.innerHTML;
        $(this).empty().append($('<a href="#">'+ text +'</a>').click(function() {
          var fieldset = $(this).parents('fieldset:first')[0];
          // Don't animate multiple times
          if (!fieldset.animating) {
            fieldset.animating = true;
            Drupal.toggleFieldset(fieldset);
          }
          return false;
        }))
        .after($('<div class="fieldset-wrapper"></div>')
        .append(fieldset.children(':not(legend):not(.action)')))
        .addClass('collapse-processed');
    });
  };
  