[jQuery] combo boxes with ajax

[Octavian Rasnita]

Hi,
I would like to use a set of 2 or more combo boxes that use ajax so when I 
select an item from the first combo box, an ajax request is sent to the 
server for getting the items for the second combo box.

Please tell me what's the recommended way of doing this. Is there a jQuery 
plugin or another way?

Thank you.

--
Octavian