<?xmlversion="1.0"encoding="utf-8"?>

<mx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"layout="absolute">

<mx:Buttonx="144"y="190"label="Button">

<mx:click>

<![CDATA[

importmx.controls.Alert;

Alert.show("click");

]]>

</mx:click>

<mx:focusOut>

<![CDATA[

importmx.controls.Alert;

Alert.show("focusOut");

]]>

</mx:focusOut>

</mx:Button>

</mx:Application>

对优化代码很有好处