使用ExternalInterface.call在as中调用js方法：
1.MXML代码如下：
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx=http://www.adobe.com/2006/mxml layout="vertical" verticalAlign="middle" backgroundColor="white"> <mx:Script> <![CDATA[ private function callJavaScript():void { ExternalInterface.call("sayHelloWorld"); } ]]> </mx:Script> <mx:Button label="Say 'Hello World'" click="callJavaScript();" /> </mx:Application>2.js代码:
<script language="JavaScript" type="text/javascript"> function sayHelloWorld() { alert("Hello World, from JavaScript"); } </script>或者，可以不用直接在HTML页中写JavaScript代码，而是以外部JS文件导入的方式：
/src/scripts.js
function sayHelloWorld() {
alert("Hello World, from JavaScript");
}
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/html-template/index.template.html
<script src="scripts.js" language="JavaScript"></script>
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如果想向JavaScript函数中传参，方法如下：
// JavaScript
function sayString(str) {
alert(str);
}
// ActionScript 3.0
private function callJavaScript():void {
ExternalInterface.call("sayString", "Hello World, from ActionScript");
}