Disabling the session reset timeout for certain requests

[Untitled]

Using Ajax .NET (or javascript) to auto-refresh some pages causes the
Session timeout to reset. In my application I have certain panels that
i would like to update every 10 seconds or so, but i don't want that
to affect the timeout of the session - i still want the session to
timeout after 20 min.

Basically, i would like to NOT reset the session timeout on certain
requests (even though they use the session information).

Is there anyway of doing this?

Mark