jQuery Grid Plugin - jqGrid

Hello,

I wish I could return a parameter has jqGrid staff to see if the user session is alway open.

For example, when you refresh a grid, if skipped the session I am referring to an empty table but I do not know if it's a session or if the table 's really empty.

So if I could return a parameter personal example: openSession = 0 or 1 it could afford in jqGrid to test this value and return the user login page.

Thank you for your advice and help