Flex中DateField，Alert的中文汉化

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="white" backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#F0F3FA, #86F1E6]">
<mx:Script>
        <![CDATA[
        import flash.events.MouseEvent;
        import mx.controls.Alert;
       
        public function btClick(evt:MouseEvent):void
        {
                if (lg.selectedValue == "zh")
                {
                        Alert.yesLabel = "是";
                Alert.noLabel = "否";
                Alert.cancelLabel = "取消";
                        Alert.show("警告信息！","标题",1|2|8,this);
                }else{
                        Alert.yesLabel = "yes";
                        Alert.noLabel = "no";
                        Alert.cancelLabel = "cancel";
                        Alert.show("alert message here!","title",1|2|8,this);     


                }
        }
        ]]>
</mx:Script>
        <mx:ApplicationControlBar dock="true" fillAlphas="[1.0, 1.0]" fillColors="[#C7E3F3, #BFE7FA]">
                <mx:RadioButtonGroup id="lg" />
                <mx:RadioButton id="en" label="English" groupName="lg" value="en"

selected="true" />
                <mx:RadioButton id="zh" label="中文" groupName="lg" value="zh" />
        </mx:ApplicationControlBar>
        <mx:Button label="show alert" click="{btClick(event)}" />
<mx:DateField yearNavigationEnabled="true"   
    dayNames="['日','一','二','三','四','五','六']"
    monthNames="['一月','二月','三月','四月','五月','六月','七月','八月','九

月','十月','十一月','十二月']"
     formatString="YYYY-MM-DD" fontSize="12"/>
</mx:Application>