DevExpress ChartJS selected series

Show series labels on click

HTML

<script src="http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/globalize/0.1.1/globalize.min.js"></script>
<script src="http://cdn3.devexpress.com/jslib/13.1.6/js/dx.chartjs.js"></script>
<div id="chartContainer"></div>

JavaScript

var dataSource = [
    { country: 'China', y014: 320866959, y1564: 853191410, y65: 87774113 },
    { country: 'India', y014: 340419115, y1564: 626520945, y65: 47063757 },
    { country: 'United States', y014: 58554755, y1564: 182172625, y65: 34835293 },
    { country: 'Indonesia', y014: 68715705, y1564: 146014815, y65: 10053690 },
    { country: 'Brazil', y014: 50278034, y1564: 113391494, y65: 9190842 },
    { country: 'Russia', y014: 26465156, y1564: 101123777, y65: 18412243 }
];
var series = [
    { valueField: 'y014', name: '0-14 years' },
    { valueField: 'y1564', name: '15-64 years' },
    { valueField: 'y65', name: '65 years and older' }
];
 
$(function () {
    var chartDiv = $('#chartContainer').dxChart({
                dataSource: dataSource,
                commonSeriesSettings: {
                    argumentField: 'country',
                    type: 'area'
                },
                series: series,
                title: 'Population: Age Structure (2000)',
                legend: {
                    horizontalAlignment: 'center',
                    verticalAlignment: 'bottom'
                },
                seriesClick: function (clickedSeries) {
                    var seriesValField = clickedSeries.options.valueField;
                    alert(seriesValField);
                    
                                   
                }
            });
});