How can Google Docs go fullscreen in JavaScript

Question

How can Google Docs go fullscreen in JavaScript?
In a Google Docs Presentation, when you press the fullscreen button at the lower left corner of the window, the window goes fullscreen.
It is not Flash so I am curious that how can Google do that?

Added

Note that it is not creating a big window that fits the screen (that's fake fullscreen). It is actually in fullscreen mode, and Google Chrome asked for my permission.

Answer 1

It seems they are using the technique described in this article: http://www.thecssninja.com/javascript/fullscreen

// Mozilla
element.mozRequestFullScreen();

// Webkit
element.webkitRequestFullscreen();

Edit: That article forgets to mention that if you want the whole page fullsreen you can do document.body.webkitRequestFullscreen();.

Answer 2

I've tested the code given in this question on Internet Explorer 9:

How to make browser full screen using F11 key event through JavaScript

At least for Internet Explorer 9, though, the permission dialog might be misleading.