Assiginig Tooltip for iviews and roles

Dear Experts,

We have a scenario under which we have to display the tooltip(display whenever cursor is kept over it, it should give some info about the iview/tab) whenever a user puts cursor on any ivew or a role, as we generally get whenever we take the cursor to logoff tab..

Waiting for your early responce...

Thanks and Best Regards

Shashank