how can a post-back be prevented for a button?

[Guest]

my web page consists of a timer along with a number of buttons ( application
for tambola game). the timer raises an event on it's expiry time. that is
fine. but i doun't what some of the buttons to throw the post-back(refreshing
of page every time). i need only the page to refresh only when the timer
expires. but not for the (some) button clicks.

this web application is developed in asp.net present version.

 

[Vadym Stetsyak]

On of the solutions can be declaring buttons that do not need to throw
postback as client ones ( do not write runat="server" ) and then control
everything from js on the client-side.