[xAJAX] Map qui ne s'affiche pas

Code PHP :

<?php

    include ('connection.php');

    include ('Vue.class.php');

    include ('header.inc.php');

    require("xajax.inc.php");

    include ('deplacer.php');



    $sql = 'SELECT `X`, `Y` FROM `ad_casesterre` WHERE `idPerso`=\''.$_SESSION['idPerso'].'\' LIMIT 1';

    $result = mysql_query($sql);

    $ligne = mysql_fetch_assoc($result);

    

    $_SESSION['iPositionX'] = $ligne['X'];

    $_SESSION['iPositionY'] = $ligne['Y'];

    

    $vision = new Vue($_SESSION['iPositionX'], $_SESSION['iPositionY'], 8);    

    $vision->Mappage();

    $vision->Vision();

    

    $xajax = new xajax();



    //Debug

    //$xajax->debugOn(); 



    $xajax->registerFunction("afficher");

    $xajax->registerFunction("deplacer");



    $xajax->processRequests();



    echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>

<head>

    <title>Titre du jeu</title>';

    echo $xajax->printJavascript();



    echo '    <script>

        function update()

        {

            xajax_afficher();

            setTimeout("update()", 1000);

        }

    </script>';

    

    echo HeaderJScript();



    echo '</head>

<body style="text-align:center;">



<div id="grille"> </div>



  <script>

        update();

      </script>

      

</body>

</html>

';

?>

Code PHP :

<?php

    session_start();



    function deplacer($dep)

    {

        global $vision;



        $iPositionX = $_SESSION['iPositionX'];

        $iPositionY = $_SESSION['iPositionY'];

        

        $vision->Mappage();

        $vision->Vision();        

        

        switch($dep)

        {

            case 'HG' :

                $iPositionX--;

                $iPositionY--;

                break;

            case 'H' :

                $iPositionY--;

                break;

            case 'HD' :

                $iPositionX++;

                $iPositionY--;

                break;

            case 'G' :

                $iPositionX--;

                break;

            case 'D' :

                $iPositionX++;

                break;

            case 'BG' :

                $iPositionX--;

                $iPositionY++;

                break;

            case 'B' :

                $iPositionY++;

                break;

            case 'BD' :

                $iPositionX++;

                $iPositionY++;

                break;            

        }

        

        $sql = "UPDATE `ad_casesterre` SET `X` = '".$iPositionX."', `Y` = '".$iPositionY."' WHERE `idPerso` ='".$_SESSION['idPerso']."' LIMIT 1" ;

        mysql_query($sql);

        

        $_SESSION['iPositionX'] = $iPositionX;

        $_SESSION['iPositionY'] = $iPositionY;

        

    }



    function afficher()

    {

        global $vision;

        $objResponse = new xajaxResponse();

        $table = $vision->AfficherGrille();

        $objResponse->addAssign("grille","innerHTML",$table);

        return $objResponse->getXML();

    }



?>