Toggle Show/Hide Lines for Highcharts

hide-show-hightcharts.js

plotOptions: {
    series: {
        events: {
            legendItemClick: function(event) {
                var seriesIndex = this.index;
                var series = this.chart.series;
                for (var i = 0; i < series.length; i++) {
                    if (series[i].index !== seriesIndex) {
                        series[i].hide();
                    }
                }
                return true;
            }
        }
    }
}