Ajax Update panel

Hi,

I am using ajax update panel to get total of 6 textboxes in one other textbox.

I placed Total's textbox under updatepanel & added <asynchronouspostback ......> in triggers for 6 textboxes.

But when asynchonous postback causes for 1st textbox if i enter value in next textboxes , It gets cleared as that asynchonous postback gets completed.

Is there any solution for this?

Priya