Highcharts.chart('container', {
    chart: {
        type: 'spline'
    },

    legend: {
        symbolWidth: 80
    },

    plotOptions: {
        series: {
            color: '#000000'
        }
    },

    series: [{
        data: [1, 3, 2, 4, 5, 4, 6, 2, 3, 5, 6],
        dashStyle: 'longdash'
    }, {
        data: [2, 4, 1, 3, 4, 2, 9, 1, 2, 3, 4, 5],
        dashStyle: 'shortdot'
    }]
});