<?php 
$the_form="clubform.php";        // form page
$the_action="joinaction.php";    // processing program

//// customized form validation begin
$check_list=array("client_name"=>"require",
           "email"=>"require",
           "age"=>"age_check");

function age_check($age)
{  if ( !empty($age) && is_numeric($age) 
        && $age >= 18 && $age <= 65)
   {   return "OK";  }
   else
   {   return "must be 18 to 65";  }
}
//// customized form validation end

//// Do not modify below this line
require_once("formfns.php");
if (($_SERVER['REQUEST_METHOD']=="GET" 
     && count($_GET)==0 ) || 
     ! formdata_check($_REQUEST) )
{ require($the_form);  } 
else 
{ require($the_action); }
?>