the top three are the actual icons that someone would click on, in facebook
the bottom is the splash page that is linked to the icon (when it's clicked)
On the actual splash page,
it is designed on the "on rollover" command,
so initially, it appears to be a blank page.
But once you rollover it,
you realize there is something more to it.
Also, the bottom image is also a link to DOVA's homepage.