SAP Portal Log OFF functionality need to be called in jsp

Hi Experts,

I am working on SAP portal 7.31.

I am having a requirement where in when the portal sessions time out then the page should again get redirected to the SAP portal login page.

For this I have created a JSP in which I am redirecting to the SAP portal login page.

But the problem is-

Lets assume User A and User B.

User A has logged in to portal and his session is idle for some time. Then when User A again clicks  anywhere on the portal then the Session timeout takes place.Then our JSP is called which redirects back to the Portal Logon Page.

Now If we try to login into portal with User B credentials then logged in takes place successfully but still User B can see the User A data.

These data are coming from ECC.

Now if User A do the log off and then User B enters then all works perfectly fine.Here we are not calling any JSp. The user uses the Portal Log OFF.

Now my question is in my JSP can I call the same functionality of the Log OFF. If yes then how can I do that . Please guide me on this.

Any help will be really appreciated.

Regards,

Anand