How to make another button to availabe when click one button

Hi,
There are two buttons (Button A and B)on my page. The disable property of button A is false. The disable property of button B is ture. My issue is when I click Button A, how can I change the disable property of button B to false. Then Button B can be pressed.
Thanks,
Eileen
Message was edited by:
Eileen

Generate a PPR event from button A and handle the PPR event, in the code after handling the event, write logic to set the enabled property of button B to true.
read PPR chapter in devguide to understand thr details.
Thanks
Tapash

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