Index: modules/node/content_types.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/content_types.inc,v
retrieving revision 1.100
diff -u -p -r1.100 content_types.inc
--- modules/node/content_types.inc	8 Nov 2009 19:18:24 -0000	1.100
+++ modules/node/content_types.inc	12 Nov 2009 04:56:55 -0000
@@ -192,6 +192,9 @@ function node_type_form($form, &$form_st
     '#collapsible' => TRUE,
     '#collapsed' => TRUE,
     '#group' => 'additional_settings',
+    '#attached' => array(
+      'js' => array(drupal_get_path('module', 'node') . '/content_types.js'),
+    ),
   );
   $form['display']['node_submitted'] = array(
     '#type' => 'checkbox',