PLease help... anyone... im getting really stressed and about to loose my will to live !

What im trying to do is pretty simple in concept.

I have an ezpage which i have created from scratch, and im using it to gather some extra info about the customer.

But ... i need to check if they are logged in.

Does anyone know what the name of the session thats created when you log in is called?

|Has anyone else done anything like this?

Please i need help on this !!!

Thanks guys... really appreciate your time ! :)