Without the use of flash. TO make it simple, similar to javascript.
Everything is coded in the "new" kind of html and the emergence of webm codec instead of mp4 container. That's why you can now watch youtube embeds.
It can do everything that a flash can do & more without the added bulk and bloat. That's why iOS opt out flash. To have less problems and battery life is immensely saved.
Check out a few html5 sites and try it on your phone.

Added on October 12, 2011, 12:19 amQUOTE(xcen @ Oct 11 2011, 06:36 PM)
Anyone able to access the new HTML5 Facebook webpage?
I tried m.facebook.com, and it only shows the plain old version.
I tried touch.facebook.com with mobile version preference, only facebook logo on it.
I tried touch.facebook.com with desktop version preference, can see stuff, but nothing happens when I touch at links. And the interface doesn't look like the new HTML5 site.
http://www.tomsguide.com/us/Facebook-Platf...news-12831.htmlI tried it on my laptop (m.facebook.com)
But according to:
http://www.neowin.net/news/html5-facebook-...obile-goes-liveYou can access it right now via (http://touch.facebook.com)
I confirmed it works for us.
Rejoice.

A bit buggy.
This post has been edited by Chyan: Oct 12 2011, 12:34 AM