Problèmes de 3 listes déroulantes liées AJAX

J'ai oublié de vous mettre mes scripts!

index.php

<?php
require './config.inc.php';

$mysqli = new mysqli($db['server'], $db['user'], $db['passwd'], $db['name']);

if (0 !== mysqli_connect_errno()) {
exit('Could not connect to database: ' . mysqli_connect_error());
}

$sql = 'SELECT id_manufacturer, name FROM ps_manufacturer order by name';
$sql_fam = 'SELECT cl.id_category, cl.name FROM ps_category_lang cl LEFT JOIN ps_category c ON cl.id_category = c.id_category WHERE c.level_depth = 3 order by name';
$sql_sfam = 'SELECT cl.id_category, cl.name FROM ps_category_lang cl LEFT JOIN ps_category c ON cl.id_category = c.id_category WHERE c.level_depth > 3 order by name';
?>

<script type="text/javascript" src="fabricants.js"></script>
<script type="text/javascript" src="sousfamille.js"></script>

<form action="submit.php" method="post" id="form">

<p>Sélectionnez un fabricant:
<select name="fabricants" id="fabricants" onchange="updateFamilles(this.value)">
<option selected value="">Choisir un fabricant...</option>
<?php
if (FALSE !== ($res = $mysqli->query($sql))) {

while ($row = $res->fetch_assoc()) {
printf('<option value="%s">%s</option>', $row['id_manufacturer'], $row['name']);
}
$res->close();
}
?>
</select>
</p>

<p>Sélectionnez une famille:
<select name="familles" id="familles" onchange="updateSousFamille(this.value)">
<option selected value="">Choisir une famille...</option>
<?php
if (FALSE !== ($res = $mysqli->query($sql_fam))) {

while ($row = $res->fetch_assoc()) {
printf('<option value="%s">%s</option>', $row['id_category'], $row['name']);
}
$res->close();
}
?>
</select>
</p>

<p>Sélectionnez une sous-famille:
<select name="sousfamille" id="sousfamille">
<option selected value="">Choisir une sous-famille...</option>
<?php
if (FALSE !== ($res = $mysqli->query($sql_sfam))) {

while ($row = $res->fetch_assoc()) {
printf('<option value="%s">%s</option>', $row['id_category'], $row['name']);
}
$res->close();
}
?>
</select>
</p>

<p><input type="submit" value="Soumettre" />

</form>

rpc.php

<?php

if (TRUE === isset($_GET['fabricants'])) {
$fabricants = intval($_GET['fabricants']);
} else {
exit;
}
if (($fabricants == "") or ($fabricants == " ")){
exit;
}
else{
require './config.inc.php';

$mysqli = new mysqli($db['server'], $db['user'], $db['passwd'], $db['name']);

if (0 !== mysqli_connect_errno()) {
exit('Could not connect to database: ' . mysqli_connect_error());
}

header('Content-Type: text/xml; charset=UTF-8');

$dom = new DOMDocument('1.0', 'utf-8');
$message = $dom->createElement('message');
$message = $dom->appendChild($message);

$sql = 'SELECT id_category, name From ps_category_lang Where id_category IN (SELECT DISTINCT ps_category.id_parent FROM ps_category INNER JOIN ps_manufacturer_category_lien ON ps_category.id_category = ps_manufacturer_category_lien.id_category WHERE (((ps_manufacturer_category_lien.id_manufacturer_category_lien) Like '.$region.') AND ((ps_category.level_depth) Like 4)))';

if (FALSE !== ($res = $mysqli->query($sql))) {

while ($row = $res->fetch_assoc()) {
$famille = $dom->createElement('famille', utf8_encode($row['name']));
$famille = $message->appendChild($famille);
$famille->setAttribute('id', $row['id_category']);
}

$res->close();
}

echo $dom->saveXML();
}
?>

sfam.php

<?php
if (TRUE === isset($_GET['departements'])){
$departements = intval($_GET['departements']);
} else {
exit;
}
require './config.inc.php';

$mysqli = new mysqli($db['server'], $db['user'], $db['passwd'], $db['name']);

if (0 !== mysqli_connect_errno()) {
exit('Could not connect to database: ' . mysqli_connect_error());
}

header('Content-Type: text/xml; charset=UTF-8');

$dom = new DOMDocument('1.0', 'utf-8');
$message = $dom->createElement('message');
$message = $dom->appendChild($message);

$sql = 'SELECT cl.id_category, cl.name FROM ps_category_lang cl LEFT JOIN ps_category c ON cl.id_category = c.id_category WHERE c.level_depth > 3 and c.id_parent = '.$departements.'';

if (FALSE !== ($res = $mysqli->query($sql))) {

while ($row = $res->fetch_assoc()) {
$sousfamille = $dom->createElement('sousfamille', utf8_encode($row['name']));
$sousfamille = $message->appendChild($sousfamille);
$sousfamille->setAttribute('id', $row['id_category']);
}

$res->close();
}

echo $dom->saveXML();
?>

sousfamille.js

var ajax;

try {
ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
if (typeof XMLHttpRequest!='undefined') {
ajax = new XMLHttpRequest();
}
}
}

function updateSousFamille(/*region, */departements) {
// ajax.open('get', 'rpc.php?region=' + region + '&departements=' + departements);
ajax.open('get', 'rpc.php?departements=' + departements );
ajax.onreadystatechange = handleResponse;
ajax.send(null);
}

function handleResponse() {

if(ajax.readyState == 4) {

var data = ajax.responseXML.getElementsByTagName('sousfamilles');
document.getElementById('sousfamille').innerHTML = '';
for(var i=0;i<data.length;i++) {
var option = document.createElement('option');
option.setAttribute('value',data[i].getAttribute("id"));
option.appendChild(document.createTextNode(data[i].firstChild.nodeValue));
document.getElementById('sousfamille').appendChild(option);
}
}
}

function initForm() {
// document.getElementById('regions').selectedIndex = 0;
document.getElementById('departements').selectedIndex = 0;
// updateSousFamille(document.getElementById('regions').value);
updateSousFamille(document.getElementById('departements').value);
}

if (window.addEventListener) {
window.addEventListener("load", initForm, false);
} else if (window.attachEvent){
window.attachEvent("onload", initForm);
}

fabricants.js

var ajax;

try {
ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
if (typeof XMLHttpRequest!='undefined') {
ajax = new XMLHttpRequest();
}
}
}

function UpdateFamilles(fabricants) {
ajax.open('get', 'rpc.php?fabricants=' + fabricants);
ajax.onreadystatechange = handleResponse;
ajax.send(null);
}

function handleResponse() {

if(ajax.readyState == 4) {

var data = ajax.responseXML.getElementsByTagName('familles');

document.getElementById('famille').innerHTML = '';
for(var i=0;i<data.length;i++) {

var option = document.createElement('option');
option.setAttribute('value',data[i].getAttribute("id"));
option.appendChild(document.createTextNode(data[i].firstChild.nodeValue));
document.getElementById('famille').appendChild(option);
}
}
}

function initForm() {
document.getElementById('fabricants').selectedIndex = 0;
updateFamilles(document.getElementById('fabricants').value);
}

if (window.addEventListener) {
window.addEventListener("load", initForm, false);
} else if (window.attachEvent){
window.attachEvent("onload", initForm);
}

on peut savoir comment t'as résolu?