No response processor error in multiple drop down menu PHP script

I keep getting "ERROR: No response processor is available to process the response from the server." when trying to use xajax to create a PHP coded page where one drop down menu in a form determines the content of the second which determines the content of a third. These are the relevant code snippets...

require('/home/xajax/xajax_core/xajax.inc.php');

$xajax = new xajax();
$xajax->configure('debug',true);
$xajax->configure('javascript URI', '../../xajax/');
 
class myXajaxResponse extends xajaxResponse {
 
  function addCreateOptions($sSelectId, $options) {
    $this->script("document.getElementById('".$sSelectId."').length=0");
    if (sizeof($options) >0) {
       foreach ($options as $key => $value) {
         $this->script("addOption('".$sSelectId."','".$value."','".$key."');");
       }
     }
  }
}

------------

      mysql_select_db($database_Climax, $Climax);
      $query = "SELECT Manufacturer.mfg_id, Manufacturer.mfg_name FROM Manufacturer ORDER BY Manufacturer.mfg_name";
      $qryMfg = mysql_query($query, $Climax) or die(mysql_error());
      $row_qryMfg = mysql_fetch_assoc($qryMfg);

      $mfg = array();
      do {  
            $mfg[$row_qryMfg['mfg_id']]=$row_qryMfg['mfg_name'];
      } while ($row_qryMfg = mysql_fetch_assoc($qryMfg));

      mysql_free_result($qryMfg);

      $query = "SELECT Model.mfg_id, Model.model_id, Model.model_name FROM Model ORDER BY Model.model_name";
      $qryMake = mysql_query($query, $Climax) or die(mysql_error());
      $row_qryMake = mysql_fetch_assoc($qryMake);
      $totalRows_qryMake = mysql_num_rows($qryMake);
      
      $model = array();
      do {  
            $model[$row_qryMake['mfg_id']][$row_qryMake['model_id']]=$row_qryMake['model_name'];
      } while ($row_qryMake = mysql_fetch_assoc($qryMake));

      mysql_free_result($qryMake);

-----------

      // adds options to the drop down menus dependent on previous choices
      function addModels($selectId, $mode) {
            global $model;
            $objResponse = new myXajaxResponse();
            $data = $model[$mode];
            $objResponse->addCreateOptions($selectId, $data);
            return $objResponse;
      }

      $xajax->register(XAJAX_FUNCTION,'addModels');
      $xajax->processRequest();

----------------

<?php
$xajax->printJavascript();
?>
<script type="text/javascript">
  function addOption(selectId, val, txt) {
    var objOption = new Option(txt, val);
     document.getElementById(selectId).options.add(objOption);
   }
</script>

---------------

              <tr>
                <td width="80" class="formtxt1">Make:</td>
                <td><select name="cbMake" class="formbox1" id="cbMake" onchange="xajax_addModels('cbModel', document.catsearch.cbMake.value)">
                  <option value="0" selected>All</option>
                  <?php
foreach ($mfg as $key => $value) {  
?>
                  <option value="<?php echo $key?>"><?php echo $value?></option>-->
                  <?php
}
?>
                </select>
</td>
              </tr>
              <tr>
                <td class="formtxt1">Model:</td>
                <td>
                        <select name="cbModel" class="formbox1" id="cbModel">
                  <option value="0" selected>All</option>
                  </select></td>
              </tr>

I have firebug installed but have no idea how to see what xajax is sending.
Computer_DiloAsked:
Who is Participating?
 
Marcus BointonCommented:
> I have firebug installed but have no idea how to see what xajax is sending.

Well it's probably best to sort that out first. When you are viewing the page, click the firebug icon, and enable network and scripting debugging for your site. Then you'll need to refresh the page. After that, whenever you make an ajax request, it will be listed on the firebug console, and if you click the disclosure triangle on it, you'll be able to see the original request, and be able to reload the response.

Obviously the request should look like it's asking for the right stuff and the response should contain what you expect it to.
0
 
Computer_DiloAuthor Commented:
You think I could find that information anywhere :(

Thank you!

I'll have a look asap - I've actually got the squirts and just gone to a PHP refresh instead to get the thing going.
0
 
Computer_DiloAuthor Commented:
I have switched to Ajax instead after messing around. Cheers for help!
0
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