为按钮添加一个变颜色的行为！

<? xml version="1.0" encoding="utf-8" ?>
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"  layout ="absolute" >
     < mx:Glow  id ="buttonGlow"  color ="0x99FF66"  alphaFrom ="1.0"  alphaTo ="0.3"  duration ="1500" > <!--  颜色改变的代码  -->
     </ mx:Glow >
     < mx:Panel  x ="23"  y ="22"  width ="250"  height ="200"  layout ="absolute" >
         < mx:Button  x ="33"  y ="10"  label ="按钮"  width ="110"  height ="39"  mouseUpEffect ="buttonGlow" />    <!--  mouseUpEffect在这代表组件触发器   -->
     </ mx:Panel >
</ mx:Application >