I have a VB.Net Web form that uses several panels.

The User Interface of the top of my form is "static".
It contains various buttons, including navigation controls and about 20 fields displaying basic contact information of a client or prospect.

The User Interface of the bottom of my form is "dynamic".
It contains 7 panels each containing about 10-20 fields displaying additions information and contact history.

Between to top and the bottom I have a RadioButton List control, which I use to toggle the visible property of the 7 panels in the Bottom section.

My problem is that changes to the setting of the radio buttons don't take effect until the next submit. I'd really like them to take affect immediately. Is that possible?
I don't care if I have to change my approach... the radio button list can be something else if it will work smoother.

I'm even willing to change the basic concept of the UI, if a better concept is recomended.

Thanks,
Rick