highcharts中数据列点击事件

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Highcharts.chart('container', {     xAxis: {         categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']     },     plotOptions: {         series: {             cursor: 'pointer',             events: {                 click: function (event) {                     alert(                         this.name + ' 被点击了 ' +                         '最近点：' + event.point.category + ' ' +                          'Alt 键: ' + event.altKey + ' ' +                         'Ctrl 键: ' + event.ctrlKey + ' ' +                         'Meta 键（win 键）： ' + event.metaKey + ' ' +                         'Shift 键：' + event.shiftKey                     );                 }             }         }     },     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]     }] });