Empty radio button group on submit is nothing

[FONT=Verdana]I am wondering if there is a simple way to carry over a default value of a radio group if there is nothing chosen. It is not mandatory to check one of the radio buttons in the group, but when the form is submitted no instance of that group is carried over. The naming of all the groups is dynamic, so I was wanting to check to see if there was a quick solution to pass a default value if nothing is checked. I would rather not write a javascript function to parse through all the groups and build the query string seperately.

Any help is appreciated. Thanks
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