Hi all
I would love to learn to program a similar animated text affect like the thing on:

It does not need to have the advanced gravity options and so on ...

I'm taking it's using somekind of a javascript physics engine?
Is there any libary's or code snippets that can do something like this?
And any instructions in how to set it up?

I understand simple Javascript and AJAX, - but need some help learning this ...

- Helio