[jQuery] Interface shopping cart - how to insert in DB

[jQuery] Interface shopping cart - how to insert in DB

Hi all. Interface haves a very cool shopping cart example in
<a href="http://interface.eyecon.ro/demos/cart.html">http://interface.eyecon.ro/demos/cart.html</a>
My question: how can I reference that selected products in shopping basket to insert in database? I didn't see any form field in source code for that example.
Cheers