Screen always ON when running on mobile browser (HTML5 target)

Hi,
how do I keep screen on when running my application on a mobile browser, avoiding it to turn off automatically?
Thanks

This is impossible. For a longer explanation: http://stackoverflow.com/a/19155331.

I suspected this, and it is the same for screen rotation I suppose: now I need to know if it is possible to intercept system events for screen rotation, screen deactivation etc, I have already opened a thread for this