How can I update my page with Ajax without affecting the Session?

Hi all. We would like to implement a counter of events in the header of our application without resetting the session, meaning the session should time out as if no call to a cfc and function were made. We are thinking that if we polled a function, the session would never time out. We don't want to use websockets because they are a bit buggy in CF10-hence the polling route.

Anyone know how we can do this?

Thanks for your time.

-Andy