about expiration variable session

[oranoos3000]

hi
do variable session expire after specific time from opening page?
if answer yes ?how much is this time?
else
if variable session is set on server no expiration automatically
how do expire this variable after specific time?
do variable session expire with closing page that
session in that page is set?
thanks alot

[Dormilich]

do variable session expire after specific time from opening page?
if answer yes ?how much is this time?

unless set otherwise, yes. depends on the server setting.

if variable session is set on server no expiration automatically how do expire this variable after specific time?

usually there is automatic expiration, changing the server settings is impossible with Javascript. although you can delete the session cookie.

do variable session expire with closing page that session in that page is set?

no (that's why sessions were invented—keepin g variables (such as login status) across pages)