flash 에서 GET 으로 변수값 전달시 받아 사용할때

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="feedRequest.send();">
 <mx:HTTPService id="feedRequest" url="http://localhost:8080/flex/get_xml_data.jsp" useProxy="false" />
 <mx:Panel title="HTTPService Test" height="100%" width="90%"
 paddingTop="10" paddingBottom="10" paddingLeft="10" paddingRight="10" layout="vertical">
  <mx:DataGrid id="dgPosts" dataProvider="{feedRequest.lastResult.result_set.record}" width="100%" />
  <mx:Button label="xxxxx" click="mx.controls.Alert.show(Application.application.parameters.idx)" />
 </mx:Panel>
 <mx:Script>
  <![CDATA[
   import mx.controls.Alert;
  ]]>
 </mx:Script>
</mx:Application>


------------------------html 소스-------------------------

<embed src="jspHttpServicetxt.swf?idx=xxxxx" quality="high" bgcolor="#869ca7"
    width="100%" height="100%" name="jspHttpServicetxt" align="middle"
    play="true"
    loop="false"
    quality="high"
    allowScriptAccess="sameDomain"
    type="application/x-shockwave-flash"
    pluginspage="http://www.adobe.com/go/getflashplayer">
   </embed>

--예시--