Customized Google Map

Question

To show a Google Map on an swf movie I use this code:
var map:Map = new Map();
map.key = "key";
map.sensor = "false";
map.setSize(new Point(350, 320));
map.x = 380;
map.y = 175;
map.addEventListener(MapEvent.MAP_READY, onMapReady);
this.addChild(map);
function onMapReady(event:Event):void {
     map.addControl(new ZoomControl());
     map.addControl(new MapTypeControl());
     map.setCenter(new LatLng(41.893932,12.488177), 15, MapType.NORMAL_MAP_TYPE);
     var m:Marker = new Marker(new LatLng(41.893932,12.488177));
     map.addOverlay(m);
Now I want that passing the mouse pointer on the marker a baloon with some informations pops up.
How can I do that? I know I have to add and event listener like
map.addEventListener(MapMouseEvent.ROLL_OVER, showBaloon);
but I don't know what to write inside the function.

Answer 1

I've tried this code
var request:URLRequest = new URLRequest("images/img.jpg");
    var imageLoader:Loader = new Loader();
    imageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,
        function(event:Event):void {
            var options:InfoWindowOptions = new
                InfoWindowOptions({
                    customContent: imageLoader,
                    pointOffset: new Point(0,-30),
                    drawDefaultFrame:true
            map.openInfoWindow(e.latLng,options);
    imageLoader.load(request);
It makes appear the image, but I don't know how to add elements to "customContent" in addition to the image, actually I don't either know if it is possible.