Ajax request from onChange event

Hi

How can I initiate an Ajax request from the onChange event in a CHtml::dropDownList list? I would like to do pretty much what is done here, but without using an Ajax button.

Thanks

maybe this cook http://www.yiiframework.com/doc/cookbook/24/

Perfect, thank you very much! I should have seen it.

I also have the same problem.

How I can initiate an ajax request on dropdown change event. I have seen many posts but the Ajax call is in PHP, How to do that in javascript.