Hello Javed,
sorry for the late answer, I was on holiday :-D
so you can do pretty much what you want with WEBi 1.0.4.4 today. You need to know Javascript, and you can customize it to your taste.
The documentation on how to do it can be found in the installation directory of WEBi, in the docs directory you have the whole Javascript API descriptions.
I haven't done Javascript dev with WEBi at the moment, but I'm sure you'll find what you need in there :-)
Sincerely yours,
Alessandro