Displaying images in map rollover balloons

HTML

<script type="text/javascript" src="http://www.amcharts.com/lib/3/ammap.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/maps/js/worldLow.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/themes/dark.js"></script>
<div id="chartdiv"></div>

CSS

#chartdiv {
    background: #3f3f4f;
    color:#ffffff;
    width : 100%;
    height : 500px;
}

JavaScript

var map = AmCharts.makeChart("chartdiv", {
    "type": "map",
    "theme": "dark",
    "pathToImages": "http://www.amcharts.com/lib/3/images/",
    "dataProvider": {
        "map": "worldLow",
            "areas": [{
           id: "FR",
            customData: "<img src='http://placekitten.com/80/80' style='width: 80px; height: 80px;' />"
  
        }]
    },
    "areasSettings": {
        "autoZoom": true,
        "balloonText": "[[customData]]",
        "selectedColor": "#CC0000"
    }
});