有时候想实现鼠标在Series上移动的时候能够在Legend的Text上动态显示对应的值。可以在页面中添加如下代码（需要在该代码前引入highcharts.js）

(function (H) {   H.Series.prototype.point = {};    H.Chart.prototype.callbacks.push(function (chart) {       $(chart.container).bind('mousemove', function () {           var legendOptions = chart.legend.options,               hoverPoints = chart.hoverPoints;                      if (!hoverPoints && chart.hoverPoint) {               hoverPoints = [chart.hoverPoint];           }           if (hoverPoints) {               H.each(hoverPoints, function (point) {                   point.series.point = point;               });               H.each(chart.legend.allItems, function (item) {                   item.legendItem.attr({                       text: legendOptions.labelFormat ?                            H.format(legendOptions.labelFormat, item) :                           legendOptions.labelFormatter.call(item)                   });               });               chart.legend.render();           }       });   });   // 隐藏tooltip，允许crosshair   H.Tooltip.prototype.defaultFormatter = function () { return false; };}(Highcharts));