Whether the user's browser renders, downloads or executes a link is up to the brower's settings and the link or web-page's MIME-type settings. Of course Microsoft browers have a tendency to look to the filename-extension as well and this messes things up. If you make a dynamic web-page (with mod_perl of course!) you should take care of putting the right mime-type for the content header.

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law