Come non detto

Ora mi da errore

box is null
[Break on this error] box.innerHTML="";
Pero' mi sembra che sia tutto corretto :master:
Dove sbaglio?

Ari-Edit
Il problema e' non "riscrivevo" la select

Quindi, ora risolvo cosi' (e funziona anche su IE )

Nella codice chiamato da Ajax
Codice PHP:
<?php
require_once('config.clearwire.es.php');
require_once(
_PATH_COMMON_CLASES."classGoogleMaps.php");

$sLanguageNav=substr($_SERVER['HTTP_ACCEPT_LANGUAGE'],0,2);

$oGoogleMap=new GoogleMap();
$oGoogleMap->setLanguage($sLanguageNav);

$aCityList=$oGoogleMap->getGoogleCityList($_POST[new_state]);

$_SESSION[GOOGLE_MAPS][CITY_LIST]=$aCityList;
$_SESSION[GOOGLE_MAPS][STATE_SELECTED]=$_POST[new_state];
$_SESSION[GOOGLE_MAPS][CITY_STATE_LOADED]=$_POST[new_state];

echo 
"<select class=\"texto_combos\" style=\"width:100px\" id=\"city\">";
foreach (
$aCityList as $key=>$value){
    if(
$key==$city_default){
        
$selected="selected";
    }else{
        
$selected=false;
    }
    echo 
"<option $selected value='$key'>$value</option>";
}
echo 
"</select>";


?>
Nella pagina principale

Codice PHP:
                                            <div id="cityDiv" name="cityDiv">
                                            <select class="texto_combos" style="width:100px" id="city">

                                                <?php
                                                
foreach ($aCityList as $key=>$value){
                                                    if(
$key==$city_default){
                                                        
$selected="selected";
                                                    }else{
                                                        
$selected=false;
                                                    }
                                                    echo 
"<option $selected value='$key'>$value</option>";
                                                }

                                                
                                                
?>

                                            </select>
                                                </div>
Grazie ancora per la pazienza e spero che questo 3D serva a qualcuno
Ciao