var checkStr = theForm.id.value;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i)   
      if ((ch>'9') || (ch<'0'))
      {
       theForm.id.focus();
       theForm.id.select();
       newalert(iderror3);
       return (false);
      }
  }