flex国际化如何动态获取浏览器的语言，然后使用对应的国际化

var str:String = ExternalInterface.call("getLanForBrowser", "");   //"en_US"
resourceManager.localeChain = [str];

 <script type="text/javascript">

function getLanForBrowser()
{
    var language;
    if (navigator.language) {
        language = navigator.language;
        }
        else {
        language = navigator.browserLanguage;
        }
    return language;
}
</script>