Making Groups Visible Using Parameters

Hi everyone,

I am new to reporting services and really need some help..
Im trying to simply my requirement using this scenario: Lets say

I want to display Sales for the current year (i.e from the start of the year january to the month we are currently at). The next requirement is to group these sales, by Area , Region , Zone...

Top leve l = Zone , then Region then Area.

I need the user to be able to control this using a parameter (i.e User can select "View Area Level" or "View Region Level" or "View Zone level")

How can this best be achieved ?

My idea was using row groupings and controling visibility using the parameter.. The problem is.. If i want to view ONLY the area level and not see anything above, can I turn visibility off of the Zone and Region and still see the inner group (area)

Area Level (default view)

Jan Feb
Area 1 100 100
Area 2 200 200

Region Level Selected

Reagion 1
Area 1 100 100
Region 2
Area 2 200 200

Zone Level Select

Zone 1
Region 1
Area 1 100 100
Region 2
Area 2 200 200


Any help would REALLY be appreciated ..

Kind Regards,
Neil