I have Drupal 7 with CKEditor 3.6.2.7275 under Wysiwyg module. In configs of Wysiwyg I unchecked all the checkboxes for "Cleanup and output" category. Plus unchecked "Limit allowed HTML tags" for Full HTML text format.

When I try to edit the page, containing javascript inside, the <script type="text/javascript"> is inside the <textarea> for content editing. But it's not shown by CKEditor when I click source button. So it's undoubtedly CKEditor filtering.

What should I do to make CKEditor show javascript?