Is there any way of moving to HTML 5 and still promise multi browser compatibility?

Question

I am a designer whose main marketing strategy is multi browser compatibility. I assure my clients that the site will work even in IE6 (!).

Of late i have been pondering

Answer 1

yes there are several ways.

but if you DONT need html5 elements like video tags, or html5 api's like browser databases, stay at XHTML,because it is still not recommended by W3C. There you can use simple fallbacks for ie6.

do you need html5 elements and apis?