一则从网上找的加载图片出错显示默认图片的例子

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
  <mx:Script>
    <![CDATA[
      import mx.controls.Image;
      private function goDefault(e:IOErrorEvent):void
      {
        //加载默认图片
        var img:Image = e.target as Image
        img.load("http://l4cd.net/blog/styles/L4cd.Net/images/logo.jpg");
      }
    ]]>
  </mx:Script>
  <mx:Image source="http://www.l4cd.net/这中不存在的图片.jpg" ioError="goDefault(event)" x="25" y="24"/>
</mx:Application>