a session will last until its timeout, even if you close the
browser.
the server has no way of knowing that you have closed your
browser, the
only thing the server can track are (page) requests from same
session.
if there were no new requests from session and the timeout
has come, the
server will end the session.
a new browser instance will usually start a new session after
a browser
has previously been closed.
--
Azadi Saryev
Sabai-dee.com
Vientiane, Laos
http://www.sabai-dee.com