echarts3地图如何添加点击事件？ 点击地图相应的区域ajax获取并展示本区域省下面所有市的信息
myChart.on('click', function (params) {
var city = params.name;
loadChart(city);
});
myChart.on('click', function (params) {
var city = params.name;
loadChart(city);
});