before rendering of an extended data table is complete the is a circle which shows the user some processing is done and he has to wait.
is this circle availiable as separate component?
i want to use it, to show the user some data lookup is going on....
No it's not available as a standalone component. You can start from reading this: http://www.jboss.org/community/docs/DOC-11863 and that:
http://www.prototypejs.org/api/element/cloneposition to implement such thing.