Как сделать кнопку "Прочитано" для сообщений?

<?php
if(!defined('DATALIFEENGINE')) {
	die( "Hacking attempt!" );
}

if( !$is_logged ) die( "not_logged" );
	
if( $_REQUEST['user_hash'] == "" OR $_REQUEST['user_hash'] != $dle_login_hash ) {
  die( "session_error" );
}

$id = intval($_POST['id']);
$success = false;

$row = $db->super_query( "SELECT id, user, user_from, pm_read, folder FROM " . USERPREFIX . "_pm where id= '{$id}'" );
if( $row ) {
  
    if( ($row['user'] == $member_id['user_id'] AND $row['folder'] == "inbox") ) {

        if( !$row['pm_read'] ) {

            $db->query( "UPDATE " . USERPREFIX . "_users SET pm_unread=pm_unread-1  WHERE user_id='{$member_id['user_id']}'" );

            $db->query( "UPDATE " . USERPREFIX . "_pm SET pm_read='1'  WHERE id='{$row['id']}'" );
            $success = true;	

        }

    }

}  
echo ($success ? 'true' : 'false');
?>

"{$lang['pm_aread']}": function() {
	document.location='{$PHP_SELF}?do=pm';			
}

"{$lang['pm_aread']}": function() {
	document.location='{$PHP_SELF}?do=pm';			
},
"Прочитано": function() {
	pm_setread({$row['id']});			
}

SELECT subj

SELECT id, subj

function pm_setread(id) {
	
	$.post( dle_root + "engine/ajax/controller.php?mod=pm_read", {id:id, doaction:'setread', user_hash: dle_login_hash }, function(data) {
		
		if( data == 'true' ) console.log('Успех');
		else console.log('Неудача');

	});
}