Hugs plugin, Haskell Browser

Teachers in Haskell, I often use Haskell demos in teaching algorithms. The problem is that this does not integrate well with the rest of the material, e.g. lecture notes or slides in PDF or HTML. I'd like to integrate explanations and demos and explorative changes to algorithms. This needs better support. Is there something like a Hugs plugin for Netscape? Is there something like a Haskell source browser producing XML or HTML? Thanks for all hints Robert Giegerich