--- a/js/mpiwg.js	Mon May 27 23:12:07 2013 +0200
+++ b/js/mpiwg.js	Mon May 27 23:12:33 2013 +0200
@@ -70,6 +70,21 @@
             $img.toggle();
         }
     });
+    $('.foldable2').each(function () {
+        var $this = $(this);
+        var $head = $this.find('.fold_head2');
+        var $img = $head.find('img');
+        var $body = $this.find('.fold_body2');
+        $head.on('click', function () {
+            $body.slideToggle('fast');
+            $img.toggle();
+        }).css('cursor', 'pointer');
+        if (! $this.hasClass('initially_open')) {
+            // hide body initially
+            $body.hide();
+            $img.toggle();
+        }
+    });
     $('.foldableById').each(function () {
         var $container = $(this);
         var io = $container.hasClass('initially_open');