OnSelectedIndexChanged not fired if exist with a submit button

[znet]

Hi all,
I have a page with a dropdownlist and a textbox and a button. I want the user to search product either by ID (using textbox and submit button) or by product type (using dropdownlist). But I can’t get the OnSelectedIndexChanged event to fire. If I not use the submit button, it works fine. Who can help me,
Thanks

 

[checkai]

do you have autopostback = true on the ddlist?

 

[znet]

Hi Checkai,
Yes I have autopostback = true on the ddlist, if not that button, OnSelectedIndexChanged event works fine.

 

[znet]

Hi Checkai,
I got it, it's javascript error. I set button id='submit' mistakely. Just change it, for ex id='submit1', then everything works fine. Thanks your time.