combox onChange event

hello,



I am using z.attachEvent(“onChange”,clearKumiConfirm);    



if I click the combox, the onChange event is Responsed.



but if I manually changed the value of the combox ,the onChange event is not Responsed. why?



how to make the onChange event is Responsed when I manually changed?



Its very urgent .

please help me.

Thank you

how to make the onChange event is Responsed when I manually changed?

The event will occur when text changed and focus moved outside of control