Ajax框架12029,12007错误

Ajax框架12029,12007错误

 <script language=”javascript” type=”text/javascript”>
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
    function EndRequestHandler(sender, args)
    {    
        if (args.get_error() != undefined)
        {
           if ((args.get_response().get_statusCode() == ‘12007′) || (args.get_response().get_statusCode() == ‘12029′))
           {
                   document.writeln(”服务器连接失败。”);
                   window.onerror = false; //JS中遇到脚本错误时不做任何操作
            }
        }
    }
</script>