Displaying rollover information in a fixed position div

HTML

<script src="https://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="https://www.amcharts.com/lib/3/serial.js"></script>
<div id="chartdiv"></div>
<div id="balloon">--</div>

CSS

body {
    font-family: Verdana;
    font-size: 12px;
    padding: 10px;
}
#chartdiv {
	width	: 100%;
	height	: 300px;
}						
#balloon {
    position: absolute;
    top: 241px;
    right: 39px;
    background: #fff;
    border: 1px solid #ccc;
    opacity: 0.8;
    padding: 5px;
    font-size: 15px;
}

JavaScript

var chartData = generateChartData();
var chart = AmCharts.makeChart("chartdiv", {
    "type": "serial",
    "dataProvider": chartData,
    "valueAxes": [{
        "axisAlpha": 0.2,
        "dashLength": 1,
        "position": "left"
    }],
    "graphs": [{
        "id":"g1",
        "balloonText": "",
        "bullet": "round",
        "bulletBorderAlpha": 1,
		"bulletColor":"#FFFFFF",
        "hideBulletsCount": 50,
        "title": "red line",
        "valueField": "visits",
		"useLineColorForBulletBorder":true
    }],
    "chartScrollbar": {
        "autoGridCount": true,
        "graph": "g1",
        "scrollbarHeight": 40
    },
    "chartCursor": {
        "cursorPosition": "mouse"
    },
    "categoryField": "date",
    "categoryAxis": {
        "parseDates": true,
        "axisColor": "#DADADA",
        "dashLength": 1,
        "minorGridEnabled": true
    }
});



// generate some random data, quite different range
function generateChartData() {
    var chartData = [];
    var firstDate = new Date();
    firstDate.setDate(firstDate.getDate() - 5);

    for (var i = 0; i < 1000; i++) {
        // we create date objects here. In your data, you can have date strings
        // and then set format of your dates using chart.dataDateFormat property,
        // however when possible, use date objects, as this will speed up chart rendering.
        var newDate = new Date(firstDate);
        newDate.setDate(newDate.getDate() + i);

        var visits = Math.round(Math.random() * (40 + i / 5)) + 20 + i;

        chartData.push({
            date: newDate,
            visits: visits
        });
    }
    return chartData;
}