Thread:Project:Support desk/Hide Left Navigation Area with Keyboard Shortcut

My Versions: MediaWiki: 1.16.5, PHP: 5.2.17, MySQL: 5.1.61

I added the Javscript on the following page: http://www.mediawiki.org/wiki/Manual:FAQ#How_do_I_hide_the_left_vertical_navigation_toolbar

However when I press F11 it shows the site in Fullscreen and doesn't hide the menu.