Framework log-off

Hi,

we have a web framework for our reports. Users must login. I try to create a log-off button but it doesn't work. My first try was javascript:self.close() - not fine. Now I try it via SAP functions <URL>/sap/bw/BEx?CMD=LOG_OFF&sap-sessioncmd=close but now I see a ad hoc report page? Only I need a log-off function maybe with a redirect to our intranet page. Ideas?

Greets, Thomas