Chain selection with jquery-1.4.4.min does not work on v2.1.2, it works on v1.7.3

[eluser]Julia Yan[/eluser]
Thanks for your reply, and which means my code meet v1.7.3, does not meet v2.1.2?
$config['csrf_protection'] = FALSE;//or TRUE; both nothing happened

However, I find error code with firebug and fixed it.
So it is totally mistake with code without CI version. Sorry about it.

Thanks again skunkbad!!!