How to pass radio selected radio button value to a new protocol using Javascript - for Dynamic Content Container

Hi,

I'm playing with the Dynamic content containers and I can get a protocol to disply in them when a Submit button is pressed. I can pass values from List Boxes or Text boxes but I'm stumped as to how to do it from a radio button.

I can't seem to get it to get a value for the number of radio buttons present under a single name, therefore I can't loop through them to query which one is checked.

Any ideas on this - the closest thing I've found in the search forum are the Javascript examples posted by rtruelove back in 2008. The radio button example there differs in that the action is run when te radio button is clicked, I'm trying to get the value when a Submit button is clicked.

Intended action:
1) User selects one of 3 radio buttons
2) User hits Submit button
3) Javascript gets value of checked radio button and calls RunProtocol function passing radio button value as a parameter.

Thanks for any help.
Tris