function IsCBFldChecked(field) {
 var ischecked = false;
 for (i = 0; i < field.length; i ++) {
  if (field[i].checked) {
   ischecked = true; // as long as one is chosen this gets set true
   return true;
  }
 }
 if (ischecked == false) {
   return false;
 }
}