[TYPO3-english] chained selectbox in typo3 backend (ajax)

[Jochem Nabuurs]

Hi List,

I have an extension which allows editors to add employees.
Editors must fill in fields like name, address, etc but also the 
selectboxes unit, main departement, departement and subdepartement.

When a unit is selected, the selectboxes with main departement, 
departement and subdepartement must change accordingly.

I'd like to do this with ajax calls but I don't know where to start. 
I've build my extension with the kickstarter, which does not provide 
ajax based selectboxes (AFAIK).

Is it at all possible? I've read an article about ajax functionality in 
TYPO3 backend but I can't seem to figure out how to integrate it in my 
extension. Are there any extensions available which also provide the 
functionality I described?

I'm running TYPO3 4.3.2 in my test environment, but the live site runs 
4.4.2. I know this is not advised but it's the only option for now.

The article I've read is located here:
http://typo3.org/documentation/document-library/core-documentation/doc_core_api/4.2.0/view/3/9/


I hope someone can point me in the right direction.

Thanks in advance!

Jochem Nabuurs