function validateNumbers(formName, pageNumber) {

  var status = false;
  var status1 = false;
  var status2 = false;
  var status3 = false;
  
  status1 = /^\d{3}$/.test(document.forms[formName].elements[0].value);
  status2 = /^\d{3}$/.test(document.forms[formName].elements[1].value);
  status3 = /^\d{4}$/.test(document.forms[formName].elements[2].value);

  var msg = document.getElementById("errormessage");

  if(!status1 || !status2 || !status3) {
    alert(msg.value);
  } else {
    status = true;
    document.forms[formName].pageNumber.value=pageNumber;
    document.forms[formName].submit();
  }
}