highcharts：组合图，生成可以点击的横坐标
1.生成可以点击的横坐标主要的chart代码：
plotOptions: {line: { dataLabels: {enabled: true},enableMouseTracking: false},column: {pointPadding: 0.2,borderWidth: 0,dataLabels: {enabled: false},enableMouseTracking: true//启用或禁用鼠标跟踪特定系列。这包括点工具提示并单击事件在图表和点。},pie: { allowPointSelect: true, cursor: 'pointer', dataLabels: {enabled: true,color: '#000000',connectorColor: '#000000',formatter: function() {return '<b>'+ this.point.name +'</b>: '+ Highcharts.numberFormat(this.percentage, 1) +' %';}},nableMouseTracking: false }}