Dismissing a Sidebox

Hello All,
I'm working on a 1.5.8a running on PHP 8.2.4. I have a new blank sidebox which i can display or not using the includes/modules/sideboxes/file.php. I want to offer the customer the ability to hide this sidebox for the duration of their session. I realize this can be achieved utilizing either $_SESSION or a cookie file. I can do this easy enough by creating a link to set a session value. I don't want to use a link where the page reloads. I would prefer to use javascript to hide the box on screen and set a session value behind the scene.

Please advise.

Thank you,
John

I'm getting this worked out with jquery and ajax. also working on keep alive.

Thanks,
John