Template talk:Logout

I have seen this on my user page before. But Looking aat the code, it seems like it only displays a box. I do not see how it "knows" you have a new edit on your talk page. General, or Eva? Claytonius3 06:47, 12 November 2007 (MST)
 * It is a trick that makes people think they have a new message but, in fact, logs them out. The actual message which displays when someone edits your talk page is part of mediawiki and can be edited via the pages in the "mediawiki" namespace.-- 08:15, 12 November 2007 (MST)