Possible to create HTML5 Pages within HTML4 site?

[amalgamated]

Okay I know this is probably not possible but just wanted to check. I have a Joomla & Magento site that incorporates flash in several pages throughout.

iPad visitorship is becoming a significant percentage overall. Is it possible to just recreate those pages in Html5 replacing flash and display those pages to iPad visitors instead of the default flash version? Or must I recreate the entire site in Html5. Then there is the question of Html5 on Joomla & Magento as well. If there are some developers here that can offer some counsel, I work for a record label that has several brands/sites live and your reply could lead to some dev work for a cool indie record label with a 30 year history.

[zcorpan]

You don't need to recreate anything. The good thing with HTML5 is that you can start using the new features without changing anything else, and it'll still work. The old strict doctypes are even valid HTML5.