I hope it's ok to post this type of question in this forum. I wasn't sure where else to ask it.

I currently allow my customers to write html code that I save in a sql database. This html code is then rendered at the apppropriate time (based on specific urls). Anyway, in this code I allow my customers to name fields as they see fit and if they end the field name with "_req" I validate it (basically, just making sure there is a value).

This is pretty easy for text boxes or areas via the following javacript code:

function NewRentalForm_Validator(theForm)
{
  submitonce(theForm);
  var message = "Please do not leave the following fields Blank: ";
  var len = 0;
  var name = "";
  for (i=0;i<theForm.elements.length;i++)
  {
    name = theForm.elements[i].name;
    len = name.length;
    if (name.substring(0,4).toUpperCase() == "C2B_" && name.substring(len-4).toUpperCase() == "_REQ" && theForm.elements[i].value.length == 0 )
    {
       message = message + "\n   " + name.substring(4,len-4);
    }
  }
  if (message.length > 48)
  {
    alert(message);
    submitenabled(theForm);
    return (false);
  }
  return (true);
}

Now for radio buttons, I was thinking something along the lines of changing the if statement to be something like:

    if (name.substring(0,4).toUpperCase() == "C2B_" && name.substring(len-4).toUpperCase() == "_REQ" && (theForm.elements[i].value.length == 0 || !theForm.elements[i].checked))

Of course the preceeding code would make the following radio button cause the error message because one of the options wouldn't be selected

<INPUT type=radio value=male name=c2b_Sex_req> Male <BR>
<INPUT type=radio value=female name=c2b_Sex_req> Female 

If I was writing the name of the options etc, I know I could hardcode and make sure that one option of the group was checked. I'm having a problem because I won't know what the names of these option groups might be.

Any help or pointers are very much appreciated.

Paul