Could a website force the browser to go into fullscreen mode?

Question

I want to run a psychological study for which participants have to look at large images.

The experiment is done on the web and therefore in a browser window. Is it p

Answer 1

F11 takes IE and Firefox into fullscreen mode. I'm sure it's possible to go fullscreen, since YouTube and other video streaming sites can do it with Flash, but I don't know how with javascript.