JS will only run one chunk of script at a time and while it's running
even animated gifs can hang. You can certainly give an illusion of
asyncronous scripts by clever use of timers to fragment the
processing. This might release cpu time for the animations but as far
as I know there's no easy way.
Perhaps another member has experimented with a progress bar in a
different browser window? Cludgy but it might be possible.

George

On Jan 4, 4:10 pm, timothytoe <[EMAIL PROTECTED]> wrote:
> Is there any way to get smooth
> animation while JavaScript is thinking hard?  Should I be doing this
> some other way than breaking the work up into setTimer chunks?

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