asp-mode?

Does anyone know of or has anyone given any thought to an asp-mode, for Active Server Page scripting? Something that would perhaps be useful not only for Microsoft's ASP syntax, but also for other similar HTML templating languages. The problem is that in a lot of these systems, HTML is interspersed with code blocks delimited by some magic characters. Actually writing code in these systems is frustrating because emacs won't indent the language properly for you. I was thinking a system that would do some clever mode switching would be very useful for this sort of thing. It would have to hide the HTML when editing code somehow in order not to confuse the syntax parser for the language mode, and vice versa. What do y'all think, is this something that is feasible? What might be the best way to go about it, actually temporarily remove the non-code (or non-HTML) bits into another buffer, or can you just make them invisible somehow from the language mode parsers? -Jin