You will find some usefull answer here:
http://www.nabble.com/How-to-set-up-dependant-dropdowns-in-form-td20907379.html
Themselves wrote:
Phew. Big title.
I'm currently building a large scale application in Zend + Dojo, and with
it
being so new, I'm assuming I'm one of the first to
Phew. Big title.
I'm currently building a large scale application in Zend + Dojo, and with it
being so new, I'm assuming I'm one of the first to attempt such undertaking.
I have built it using Matthew Weier O'Phinney's Pastebox