function checkform ( form )
{
  // ** START **
      if (form.visitor.value == "") {
    alert( "Please enter your full name." );
    form.visitor.focus();
    return false ;
  }
  if (form.email.value == "") {
    alert( "Please enter your email address." );
    form.email.focus();
    return false ;
  }
    if (form.message.value == "") {
    alert( "Please enter your message." );
    form.message.focus();
    return false ;
  }
  {
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(form.email.value)){
return (true)
}
alert("Invalid E-mail Address! Please re-enter.")
return (false)
}
  // ** END **
  return true ;
}