Last modified: 2009-09-03 18:28:47 UTC
See http://www.mediawiki.org/wiki/Special:Code/MediaWiki/54843 reverted in http://www.mediawiki.org/wiki/Special:Code/MediaWiki/54844 because JavaScript cannot render this kind of link at the moment. Nevertheless, on the long run, there should be a way to add the link.
Btw. you are encouraged to add to the Message Documentation (language code 'qqq' in *.i18n.php files) describing the meaning and the use of messages. Had there been a documentation that the message is being used inside a JavaScript, an unnecessary amendment, commit, and its revert had been spared.
So, basically it cannot be done, but better message documentation is good.