How to generate new combobox at onchange event in first combobox using ajax (if possible)

[eluser]Computerzworld[/eluser]
Hello, i want to generate second combobox in onchange event in first combobox using ajax i want to fill up the second combobox.

How it is possilble give me brief discription. I am new in CI.
Thanks in advance.

[eluser]jtotheb[/eluser]
This might be useful to you.

http://codeigniter.com/wiki/JSON_Helper/

[eluser]Computerzworld[/eluser]
Thanks but i want to fillup second comobobox using first combobox onchangeEvent and i don't getting the link which you give me please provide some brief discription.

[eluser]jtotheb[/eluser]
I think you need to ask on a javascript forum for this one rather than here. You will get advice that will work on CI or any other framework. Try jquerys forums.