oh sorry i think the entire message did not appear.... In my page i have a textbox for which i have written server side textchanged event and the textbox is in updatepanel. In this event i am doing some calculations and setting focus to another textbox. Although focus is set on another textbox, i am unable to type anything there. The cursor blinks there but it does not allow me to type anything in it. So if anyone can tell me what can be the problem. I am trying to find this out since a week but no help yet. pls if anyone can tell me what can be the problem and what is the solution to it.