Flex 与 javascript交互,该怎么处理

Flex 与 javascript交互

XML code

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"  creationComplete="initApp();"               xmlns:s="library://ns.adobe.com/flex/spark"                xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">    <fx:Declarations>        <!-- 将非可视元素（例如服务、值对象）放在此处 -->    </fx:Declarations>    <fx:Script>        <![CDATA[//Flex            import flash.external.ExternalInterface;                        import mx.controls.Alert;                        public function javaScriptFun(value:String):String{                return "调用Flex函数成功1" + value;            }                        public function initApp():void{                ExternalInterface.addCallback("myFlexFun",javaScriptFun);                btn.addEventListener(MouseEvent.CLICK, callJs);            }                        public function callJs(event:MouseEvent):void{//应该如何召唤javascript函数？                var str:String =  ExternalInterface.call("sendToFlex","Flex");                if(str == null){                    Alert.show("召唤失败");                }else{                    Alert.show(str);                    }            }        ]]>    </fx:Script>    <s:Button x="204" y="173" label="召唤JavaScriptFun" id="btn" width="153"/></s:Application>

JScript code

<script type="text/javascript">            window.onload = function () {                document.getElementById("swfHtml").innerHTML = getSWFHTML();            }            function callApp() {                var x;                if (navigator.appName.indexOf("Microsoft") != -1) {                    x = document.getElementById("MyFlexApp").myFlexFun();//x = document.getElementById("MyFlexApp").myFlexFun("test"); 这样传递参数出错，应该如何传参？                }                else {                    x = document.getElementById("MyFlexApp").myFlexFun();                }                alert(x);            }            function getSWFHTML() {                var swfNode = "";                if (navigator.plugins && navigator.mimeTypes && navigator.mimeTypes.length) {                    // Netscape浏览器插件体系结构                        swfNode = '<embed type="application/x-shockwave-flash" src="flex/FlexProject2.swf" ';                    swfNode += 'id="MyFlexApp" name="MyFlexApp" ';                    swfNode += 'allowScriptAccess="sameDomain" ';                    swfNode += 'FlashVars ="param1=one&param2=2&param3=3&param4=four"';                    swfNode += '/>';                } else { // IE                    swfNode = '<object id="MyFlexApp" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000">';                    swfNode += '<param name="movie" value="flex/FlexProject2.swf" />';                    swfNode += '<param name="FlashVars" value="param1=one&param2=2&param3=3&param4=four" />';                    swfNode += '<param name="allowScriptAccess" value="sameDomain" />';                    swfNode += "</object>";                }                return swfNode;            }            function sendToFlex(value) {                return "返回给Flex值：" + value;            }        </script>

HTML code

<input onclick="callApp();" value="调用Flex" type="button" />