// returns true if a checkbox is checked
function IsCBFldChecked(field) {
 if (field.length != undefined) {
  for (i = 0; i < field.length; i ++) {
   if (field[i].checked) {
    // true as long as one is chosen this gets set true
    return true;
   }
  }
 } else {
  if (field.checked) {
   // true if a single lone checkbox checked
   return true;
  }
 }
 return false;
}