Ajax AutoCompleteExtender and Textbox text changed Evernt problem

Hi

     I am using ajax autocomplete extender with textbox and also using text changed event of that textbox.

The problem is i enter the text in textbox the search value will display on the list using autocomplete extender, when i start to drag down  the scroll bar from search list,  the text changed event called  before i selecting the values.  This is happening is IE, google chrome and opera  but it working properly in mozilla firefox.

Then i used  onclientitemselected event in autocomeplete extender control  this wil trigger the textchanged event when the item is selected from the list.  But i need to fire the event when the text box loses its focus, for both  after slected from the list and manually entered in the textbox.

If anybody facing this kind of issues please let me know.

Thanks