Even knowing that this wasn't your question, I'd like to point out something that may help you even more, considering this will run in a controlled environment.

XForms is a not-so-new-but-not-so-known technology that implements a client-side MVC infrastructure to HTML forms. This is a W3C standard (http://www.w3.org/TR/xforms/) that has a quite stable support in mozilla by the use of an extension (http://www.mozilla.org/projects/xforms/), and recently CGI.pm has accepted a patch I made to support XForms requests.

When you install the XForms extension, you can see the mozilla examples (http://www.mozilla.org/projects/xforms/samples.html), and you'll see how this can help in controlled environments such as intranets. The difference is that you'll receive structured data as XML, instead of having to workaround it in html.

There's also a patch for HTTP::Body (http://rt.cpan.org/Ticket/Display.html?id=22057) to support that, but that patch wasn't accepted yet.