[jQuery] Zend Framework and chained dropdowns

[jQuery] Zend Framework and chained dropdowns


I almost have this I am just stuck. I have two dropdowns. The first
one determines what goes in the second on.e When I select the first
one, it has an onChange event and it calls an action which returns my
data. I have no idea on how to make this data update my second
dropdown box.
Should the data echo?
Should the data be view variables?
Can someone give me some guidance?