And, re "I am specificly interested in input handling from forms": if you're not fairly expert (no assumption, but if this helps, good) with html, check the examples at w3c at w3.org example (but stick to their examples, as trying to parse their definitions/specifications is, IMO, apt to be frustrating and far less than comprehensive.)

other useful refs and/or examples

• A good starting point at WDG
• MIT's xhtml guide
• enhydra - focus on DOM and a java implementation, but solid forms info to start>