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js ´úÂë
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function hello(param) {
alert(param);
return "jsp Hello:" + param;
}

function callFlexFunction() {
var x = document.getElementById("flexObject").flexHelloWorld("Hello", "world");
alert(x);
} 
  
html´úÂë
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<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553537800"
width="640" height="378" id="flexObject">
<param name="allowScriptAccess" value="always" />
<embed src="Test.swf" mce_src="Test.swf" width="640" height="378"
name ="flexObject" play="true" loop="false"
allowScriptAccess="sameDomain"
type="application/x-shockwave-flash"
pluginspage="http://www.adobe.com/go/getflashplayer">
</embed>
</object> 
Flex ´úÂë
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<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
initialize="initApp()">

<mx:Script>
<![CDATA
import mx.controls.Alert;

public function flexHelloWorld(param1:String, param2:String):String {
Alert.show("param1: " + param1 + "; param2:" + param2);
return "Hello " + param1 + param2;
}

public function initApp():void {
ExternalInterface.addCallback("flexHelloWorld", flexHelloWorld);
}

p