What else is the author supposed to do? HTML5 is still in its infancy and browser support varies quite a bit. I have written several HTML5 experiments that work

What else is the author supposed to do? HTML5 is still in its infancy and browser support varies quite a bit. I have written several HTML5 experiments that work in some browsers and not in others (most notably for me is Chrome and Firefox support the FileReader API while Safari does not), there isn't much else that can be done at this point.