const chart = Highcharts.chart('container', {
    series: [{
        data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
    }, {
        data: [129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4, 29.9, 71.5, 106.4]
    }]
});

document.getElementById('button').addEventListener('click', e => {
    var series = chart.series[0];
    if (series.visible) {
        series.hide();
        e.target.innerHTML = 'Show series';
    } else {
        series.show();
        e.target.innerHTML = 'Hide series';
    }
});
