in reply to mod_perl progressive STDOUT indicator
You may want to dig into the idea of "multipart forms".
Forms in HTML documents
Forms in HTML documents
Try a supersearch, or take a look on CPAN:
CGI::BasePlus
This is probably a good place to start:
CGI progress indicator
Or take a peek into the AJAX world:
Ajax Patterns, IBM DeveloperWorks tutorial
Update: made the links prettier :-)
Update 2: added the note about Ajax
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