Well, it *is* possible to run perl code in the browser, via the Windows Scripting Host. But:

• It requires that all users install the relevant software (and run windows) - i.e. you must have a captive audience
• I'm not sure you'll get much in the way of graphical effects, you'll effectively be using perl as a replacement for client-side javascript.

But I may have misunderstood the technology. Given the need for installation, it's rare that this approach would make sense, anyway.