browser invocation in flex 4

<?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="Badge()">
    <fx:Script>
        <![CDATA[
            import flash.display.Loader;
            import flash.display.MovieClip;
            import flash.events.Event;
            import flash.events.MouseEvent;
            import flash.net.URLRequest;

            import mx.controls.Alert;

            private var _air:Object;
            private var _myButton:Button;

            private const APPID:String = 'remindme'; // replace with your app id
            private const PUBID:String = 'C4FD61F3CC05834EF9A9FA7AFC266F33D620A29D.1'; // replace with your publisher id
            private const APPURL:String = 'http://www.learningconcepts.in/airapps/air/rm.air'; // replace with your app url
            private const APPRUNTIME:String = '1.5'; // I’m using 1.5 as a minimum requirement for this example
            private const AIRSWF:String = 'http://airdownload.adobe.com/air/browserapi/air.swf'; // adobe’s file

            public function Badge():void
            {
                var loader:Loader = new Loader();
                loader.contentLoaderInfo.addEventListener(Event.INIT, airSwfLoaded);
                loader.load(new URLRequest(this.AIRSWF));

                //this._myButton = new Button();
                //this.addChild(this._myButton);
            }

            private function airSwfLoaded(e:Event):void
            {
                this._air = e.target.content;

                switch(this._air.getStatus())
                {
                    case 'available':
                        // install app
                        this.installApp();
                        break;
                    case 'unavailable':
                        // AIR not supported on this system
                        break;
                    case 'installed':
                        // check if app is installed
                        this.checkApp();
                        break;
                }
            }

            private function checkApp():void
            {
                this._air.getApplicationVersion(this.APPID, this.PUBID, checkAppCallback);
            }

            private function checkAppCallback(version:String):void
            {
                if (version == null) // app is not installed
                {
                    this.launchButton.label = "Install";
                    this.launchButton.addEventListener(MouseEvent.CLICK, installApp);

                    return;
                }

                this.launchButton.label = "Launch";
                this.launchButton.addEventListener(MouseEvent.CLICK, launchApp);
            }

            private function installApp(e:Event = null):void
            {
                this._air.installApplication(this.APPURL, this.APPRUNTIME, new Array());
            }

            private function launchApp(e:Event):void
            {
                var args:Array = new Array();
                args.push("aaa");

                this._air.launchApplication(this.APPID, this.PUBID, args);
            }

        ]]>
    </fx:Script>
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <s:Button id="launchButton" />
    <s:Label id="statusMessage" />

</s:Application>