Thread:Rappy/@comment-5716479-20130605200630/@comment-957747-20130607211437

You would also need the JS from the mediawiki project you grabbed the template from. Either that, or you change the Template:Navbox over to use MediaWiki's internal collapsing feature that's documented here. Keep in mind, this won't add the v-d-e links on the top left... just the [show]/[hide] links on the right.

If you wish to go with the v-d-e setup, Game of Thrones has the relevant code in their JS.