[jQuery] (validate) how can I get informed that a div is valid?

[jQuery] (validate) how can I get informed that a div is valid?


Hi
I wanted to implement a checkout process inside a single page. In that
page, I show shipping information, payment information and a summary
of the order at the end.
I was hoping I could do a partial refresh of the order summary
information when the user entered a valid shipping destination (I can
compute the shipping cost at that time).
How can I do this with jquery validate plugin?
Thanks
Phil