The thought of having to do anything remotely similar to that makes me shiver. Since MS made me go through that years ago, I simply will not go through that again. They did such a poor job with IE and it takes time for wounds to heal. Might sound a bit pathetic, but working life without having to develop for IE is much nicer. Chrome, Firefox and Safari generally behave in a similar manner. Yes, there are some inconsistencies, but nothing like IE. Especially the earlier versions (6!).