function checkr(Select) {
  document.forms[0].ChatNo[Select-1].checked=true;
  document.forms[0].elements[1].className = "ppls";
  document.forms[0].elements[3].className = "ppls";
  document.forms[0].elements[5].className = "ppls";
  document.forms[0].elements[7].className = "ppls";
  document.forms[0].elements[Select*2-1].className = "pplselect";
}