How to logout from SDN?

Hallo,

how can I logout from SDN?

Background: I want to download some business packages for the NetWeaver portal. When clicking the download, link i get a deadlink. I guess the reason for that is, that my user is not allowed for downloading. Si I would like to try it with a different user. To login with the different user, I first have to logout. But How?

Thanks a lot

Regards Mario