Cannot revert from FullScreen

Hello,

I'm programming a website which can read videos from network and which can handle a keyboard/remote command. When I press a key, the javascript detect it (jwerty) and toggle fullscreen. But then, I want to turn off the fullscreen. The key doesn't work anymore and the keys like Escape, Enter, clicks, CTRL+F ALT+F ALT+Enter CTRL+Enter aren't working more.. How to get out of this full screen ? oO Must right-click + Full screen....

The fullscreen should let the focus on the website... Or the toggleFullsreen function is useless and should be replaced by fullscreen() or setFullscreen ^^ In fact, it seems that a new window is opened and the focus is on it..

On Ubuntu ( and Debian ) : Firefox + Iceweasel. 2.0.3 Two Flowers