Changing quality

I have a full screen main flash in html with some animation. when I click a button another pop-up screen appears.

I want to change the fullscreen main flash _quality to low so I can focus my animation in the popup screen with desired speed.
(since playing two animation with same quality makes the motion sucks!)Assumeing there are lots of animation on the main and the popup as well.

I put a change quality to low whenever i open a popup screen.

My problem is how am I going to change it back to the default quality setting(let’s say previously i choose best quality) when i click back to the main flash? or when i close the popup?

Any help and comment is appreciated! Thanx alot!

what Ive seen (and done) in the past is giving a ‘return’ button or screen that, when through with the popup, click the return button to kick things back into gear on the main movie.

return button?Can you explain a bit? Sorry to border you!
any tough or complex script?
Thanx again!