do u reaally think its due to grid
as it has nothing todo with grid as such
its just a button click event in script which needs to get executed on serverside
and as i told u earlier also it was working fine in IE without alert , if no update panel is used
as ealier i had no updatepanel but just to prevent full postback i have the update panel
i am sure its has got something to do with update panel & the button click event
as without update panel , the button click event is hit without ALERT