If you don't like using JavaScript (I sure don't), then you can use SSIs. If your images are dynmically generated by the CGIs, then have another CGI which is called by an SSI exec. This CGI should have the same %ENV as the original page. This SSI then outputs the path to your current CGI, which generates the image just as it does now.

If the image isn't dynamic, then you can simply SSI exec your current CGI and have it output the path.

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I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

Note: All code is untested, unless otherwise stated