function CorpFree() {
  if(document.registerForm.AreYouCorpMemb[0].checked==true) {
    document.registerForm.MemberStatus[1].checked=true;
    }
  else {
    document.registerForm.MemberStatus[1].checked=false;
    document.registerForm.Eligible[0].checked=false;
    }
  if(document.registerForm.AttendPrevious[0].checked==true){
    if(document.registerForm.AreYouCorpMemb[0].checked==true) {
      document.registerForm.Eligible[0].checked=true;
    }
  }
  if(document.registerForm.AttendPrevious[1].checked==true) {
    document.registerForm.Eligible[0].checked=false;
  }
}


function validate(form) {

  if (document.registerForm.First_name.value==""){
    alert("First Name is a required field");
  document.registerForm.First_name.focus();
  return false;
  }

 if (document.registerForm.Last_name.value==""){
  alert("Last Name is a required field");
  document.registerForm.Last_name.focus();
  return false;
  }

 if (document.registerForm.Address.value==""){
    alert("Address is a required field");
  document.registerForm.Address.focus();
  return false;
  }

 if (document.registerForm.City.value==""){
    alert("City is a required field");
  document.registerForm.City.focus();
  return false;
  }


if (document.registerForm.Country.options[0].selected) {
  alert('Country is required');
  document.registerForm.Country.focus();
    return false;
    }

 if (document.registerForm.Phone.value==""){
    alert("Phone is a required field");
  document.registerForm.Phone.focus();
  return false;
  }


  if(document.registerForm.User_email.value.indexOf("@")== -1 ) {
        alert("You must include a valid e-mail address");
       document.registerForm.User_email.focus();
       return false;
       }


 if (document.registerForm.BadgeName.value==""){
    alert("Badge Name is a required field");
  document.registerForm.BadgeName.focus();
  return false;
  }

 flagS=-1
 for (i=0; i<form.MemberStatus.length; i++) {
    if (form.MemberStatus[i].checked) {
     flagS=1;
    }
  }
    if (flagS!=1) {
  alert ('You must select type of registrant');
  return false;
}

return true;
}