Yes, XMLHttpRequest is Windows-only. It might even be IE-only too.

and then serves back one complete web page with the frames and forms all set with all the required fields.

You're a bit loose on the details -- for example, the script cannot serve both the frame and the framed pages in the same request -- but your idea is doable.

In reply to Re^3: Moving cgi data between variables in differnt frames. by ikegami
in thread Moving cgi data between variables in differnt frames. by sailmaine

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