Server Push

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I figured out how to do server push, and I got my little animation of a
progress bar working just dandy.  However, this progress bar needs some
logic behind it.  The progress bar has to show progress, not some
sequential animation.  So I am faced with the dilemma of processing data
and keeping this progress bar updated on the same web page.  I know this
can be done, because on gifwizard.com they use it all the time.  So I
guess my question is how would you design a script that can do both
tasks at the same time? How can the progress bar animation fetch
variables from the main process?  Also keep in mind that possibly 100's
of users are requesting at the same time.

I would appreciate any feedback...

Thanks,
Rick Tuinenburg

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