Problem in showing mesage in master page.

Hi

I am having lblmessage in master page.

In the child page, i tried to show the message in that  lblmessage   in btn click event in child page.

The message is binding inside the label but is is not displayed.

I tried by put the label inside  the update panel, it is not showing.

But when i put Postback control trigger for the btn  click event, the message gets displayed.

But the page gets completely refreshed.

I want to show the message without refreshing the page.

thanks in advance