如何使用Flex Fade Effect

<?xml version="1.0"?>
<!-- Simple example to demonstrate the Fade effect. -->
<!--
	如何使用Flex Fade Effect
	MyShareBook.cn 翻譯
-->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
    initialize="Font.registerFont(myriad_font);">

    <mx:Script>
        <![CDATA[

            import flash.text.Font;

            [Embed("assets/MyriadWebPro.ttf", fontName="MyMyriad")]
            public var myriad_font:Class;
        ]]>
    </mx:Script>

    <mx:Fade id="fadeOut" duration="1000" alphaFrom="1.0" alphaTo="0.0"/>
    <mx:Fade id="fadeIn" duration="1000" alphaFrom="0.0" alphaTo="1.0"/>

    <mx:Panel title="Fade Effect Example" width="95%" height="95%" 
        paddingTop="5" paddingLeft="10" paddingRight="10" paddingBottom="5">

        <mx:Text width="100%" color="blue" 
            text="Use the Fade effect to show or hide the text and image. Use an embedded font when applying the Fade effect to text."/>

        <mx:Label text="Nokia 9930"  
            fontFamily="MyMyriad" fontSize="14"
            visible="{cb1.selected}"
            hideEffect="{fadeOut}" showEffect="{fadeIn}"/>

        <mx:Image source="@Embed(source='assets/Nokia_6630.png')" 
            visible="{cb1.selected}"
            hideEffect="{fadeOut}" showEffect="{fadeIn}"/>

        <mx:CheckBox id="cb1" label="visible" selected="true"/>

    </mx:Panel>
</mx:Application>