1）flex的源代码
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" creationComplete="{this.initApp()}">
<fx:Script>
<![CDATA[
import flash.external.ExternalInterface;
private var agentId:String;
public function get_AgentId():String
{
return agentId;
}
public function set_AgentId(agent:String):void
{
this.agentId=agent;
}
public function initApp():void {
ExternalInterface.addCallback("setAgentId",set_AgentId);
ExternalInterface.addCallback("getAgentId",get_AgentId);
}
]]>
</fx:Script>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
</fx:Declarations>
</s:Application>
2）html页面如下：
<html>
<head>
<SCRIPT language='JavaScript' charset='utf-8'>
function setAgentId() {
Mem.setAgentId("dkj");
alert("set success");
}
function getAgentId() {
var s= Mem.getAgentId();
alert(s);
}
</SCRIPT>
</head>
<body>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="20%" height="20%" id="Mem">
<param name="movie" value="MemVariable.swf" />
</object>
</br>
<button onclick="setAgentId()">setAgentId</button>
<button onclick="getAgentId()">getAgentId</button>
</body>
</html>