I'll assume we're talking about web pages from the mention of <input> and Submit buttons. To be honest, more context and more thought should have gone into the original question to clarify what you're trying to learn. How to ask questions the smart way.
This has nothing to do with Perl at all. Why was this up-voted as many as nine times? Why was this approved as a question for PerlMonks at all? Maybe I'm just a curmudgeon but I would like to learn and sometimes help with Perl issues here.