How can I use HTML5 in all browsers including IE7,8?

Question

I want to use HTML5 because it supports in Iphone also and I really liked its capabilities but what can I do if it is not fully compatible with all browsers? Specially IE fa

Answer 1

You can use http://html5boilerplate.com/ together with http://code.google.com/p/html5shiv/ and you're good to go.

For some other cool features, like video in old IE, you need to use workarounds like Flash for video and Javascript libs for canvas.