See past threads on browser focus
After wading through over 100 posts, most were either unanswered or had general replies such as yours with no real useful information on how to do this.
The closest answer I found was this:"This is a known bug of Flash Player/Mozilla browsers - SWF does not receive focus at start-up.
I am not aware about any suitable workaround available. The closest workaround is to place a button and allow user to click on it which will give SWF a focus.
PS It works in IE without any problem. Good old MS "
That answer was posted in 2008. It is now 2011 and you would think that this would have a fix by now... especially with all of the pressure for accessibility. IE 8 apparently now has this problem as well.
So, instead of sending me on a wild goose chase, it would really have been more helpful to have received an actual answer from you.
I'm not the expert in this area, and my impression is that the capabilities
of the browsers is changing daily. Therefore, I don't have a definitive
answer for you. I think I've written this summary before, but basically my
understanding is this:
you can run on IE and maybe a few other browsers to assign focus to the
player. I have seen conflicting reports on whether it works on recent
versions of FireFox, it didn't work on older ones.