function checkform ( form )
{
  if (form.contact_name.value == "") {
    alert( "Please enter your fullname." );
    form.contact_name.focus();
    return false ;
  }
   if (form.contact_number.value == "") {
    alert( "Please enter your contact number." );
    form.contact_number.focus();
    return false ;
  }
    if (form.contact_email.value == "") {
    alert( "Please enter your contact email." );
    form.contact_email.focus();
    return false ;
  }
  if (form.Messagefield.value == "") {
    alert( "Please enter your message." );
    form.Messagefield.focus();
    return false ;
  }
  // ** END **
  return true ;
}