Auto-zoom on a country when the map loads

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/none.js"></script>
<div id="chartdiv"></div>

CSS

#chartdiv {
    width : 100%;
    height : 500px;
}

JavaScript

var map = AmCharts.makeChart("chartdiv", {

    "type": "map",
        "theme": "none",
        "pathToImages": "http://www.amcharts.com/lib/3/images/",

        "dataProvider": {
        "map": "worldLow",
            "getAreasFromMap": true,
            "linkToObject": "US"
    },
        "areasSettings": {
        "autoZoom": true,
            "selectedColor": "#CC0000"
    },
        "smallMap": {}
});