get data from textbox which have extended with ajax auto complete extender

Hi All,

I have 3 textboxes called code, name, ref. Code text box has ajax auto complete extender and it working perfectly fine.

after chosing from ajax auto complete extender, i will get value into Code textbox. And then, i want to find value in db passing value from Code Text box  and

fill data into ref and name textbox. i tried with onTextchanged in Code textbox, but it did not help.

please advice