One trend graph, but multiple regions

Hello,
I have a pivot table of multiple regions, about 20. For each, by month, I have both actual and budgeted overtime data. I'd like to create just one graph that trends the actual to the budget, for just for a single site at a time. I'd like the give the users the ability to click on their particular or interested site and see the graph just for that site. click on another site, and the graph changes for that site's data. Is this possible? If so, what do I need to do? In the past, I've just created 20 graphs. thank you.

Forum search (or Google (other search engines are available)) for "Dynamic Charts".
That should bring up lots of information on this.

If you have no luck with that, post some sample data here and we'll gladly help further.

BSB.