flex 动态加载ImageMap

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<?xml version="1.0" encoding="utf-8"?>
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<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" styleName="blackButton"
    layout="vertical" 
    horizontalAlign="center" verticalAlign="middle" verticalScrollPolicy="off" horizontalScrollPolicy="off" 
    xmlns:baseClasses="flexlib.baseClasses.*" creationComplete="addCB()">
 
 <mx:Style>
  .blackButton{
  base-color:#FFFFFF;     
  } 
 </mx:Style>
 
 <mx:Script>
  <![CDATA[
   
   import flexlib.controls.ImageMap;
   import flexlib.controls.area;
   import flexlib.events.ImageMapEvent;
   
   private function addCB():void
   {    
    var imgmap:ImageMap =new ImageMap();
    imgmap.showToolTips=true;
    
    var xmlarea:area=new area();
    xmlarea.shape="POLY"; 
    xmlarea.coords="85,11,133,134,42,114,100,47,96,45,91,48,83,40,76,75,29,70,23,71,18,82,20,87,18";  
    xmlarea.alt="WA";
    xmlarea.href="http://www.baidu.com"; 
    imgmap.map=new Array(xmlarea); 
    
    imgmap.source="usa.jpg"; 
    
    //imgmap.addEventListener(ImageMapEvent.SHAPE_CLICK,function(e:ImageMapEvent):void{mx.controls.Alert.show("imagemap click:"+e.href);});    
    imgmap.addEventListener(ImageMapEvent.SHAPE_OVER,function(e:ImageMapEvent):void{
     
      mx.controls.Alert.show("imagemap click:"+e.href);
     
    });
    myHB.addElement(imgmap);

   }
  ]]>
 </mx:Script> 
  
 <mx:Button label="add ImageMap" click="addCB()" x="32" y="25"/>  
 <mx:Panel id="myHB" x="235" y="89" width="900" height="600"></mx:Panel>
</mx:Application>

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