Clear A Form

Good Day -

I have a form with 3 radio buttons that, when one is clicked, one of three
tables is displayed, (determined by the selection), each of which has 5
radio buttons. Clicking one of the first three radio buttons selects one
part of a location/time data pair, and clicking one of the 5 secondary
buttons from one of the three tables displayed selects the second part of
the location/time data pair. This works as expected.

However, I find that a user can select button #1 (location), and then select
a time from one of the five options displayed in the appropriate table, BUT
the user can then select another location (from one of the first three radio
buttons), which then opens the appropriate table for that selection, and if
the user does not make a selection from the new display, what I am left with
is a location/time data pair which don't match.

Is there a way to programmatically clear the form of data on the second
selection of one of the first three radio buttons, such as an onClick or
other event handler?

Any help or suggestions will be greatly appreciated, as this is the final
step in a long process.

Thanks in advance.

Mike Hagstrom