地图点击事件中的ajax请求不能执行echarts 地图配置项内容和展示

在地图上需要做一个点击事件,通过ajax方式查询数据,并展示弹框,但是实际开发时不能执行这段代码,求大神

      option = {
    legend: {},
    dataRange: {
        x: '120',
        y: '330',
        splitList: [{
            start: 0,
            end: 0,
            label: '正常工单',
            color: '#00FF00'
        }, {
            start: 1,
            end: 1,
            label: '8-24小时预警',
            color: '#0000FF'
        }, {
            start: 2,
            end: 2,
            label: '24-48小时预警',
            color: '#FFFF00'
        }, {
            start: 3,
            end: 3,
            label: '48-72小时预警',
            color: '#FF7F00'
        }, {
            start: 4,
            end: 4,
            label: '超过72小时预警',
            color: '#FF0000'
        }, ],
    },
    roamController: {
        show: true,
        x: 'right',
        mapTypeControl: {
            'china': true
        }
    },
    // 网格
    grid: {
        x: 80,
        y: 60,
        x2: 80,
        y2: 60,
        // width: {totalWidth} - x - x2,
        // height: {totalHeight} - y - y2,
        backgroundColor: 'rgba(0,0,0,0)',
        borderWidth: 1,
        borderColor: '#ccc'
    },
    series: [{
        name: "超时工单数量",
        type: 'map',
        mapType: 'china',
        roam: false,
        label: {
            normal: {
                show: true
            },
            emphasis: {
                show: true
            }
        },
        data: [{
            name: '北京',
            value: 0
        }, {
            name: '天津',
            value: 0
        }, {
            name: '上海',
            value: 0
        }, {
            name: '重庆',
            value: 0
        }, {
            name: '河北',
            value: 0
        }, {
            name: '河南',
            value: 0
        }, {
            name: '云南',
            value: 1,
        }, {
            name: '辽宁',
            value: 1,
        }, {
            name: '黑龙江',
            value: 1,
        }, {
            name: '湖南',
            value: 1,
        }, {
            name: '安徽',
            value: 1,
        }, {
            name: '山东',
            value: 2
        }, {
            name: '新疆',
            value: 2
        }, {
            name: '江苏',
            value: 2
        }, {
            name: '浙江',
            value: 2
        }, {
            name: '江西',
            value: 2
        }, {
            name: '湖北',
            value: 2
        }, {
            name: '广西',
            value: 2
        }, {
            name: '甘肃',
            value: 3
        }, {
            name: '山西',
            value: 3
        }, {
            name: '内蒙古',
            value: 3
        }, {
            name: '陕西',
            value: 3
        }, {
            name: '吉林',
            value: 3
        }, {
            name: '福建',
            value: 3
        }, {
            name: '贵州',
            value: 3
        }, {
            name: '广东',
            value: 2
        }, {
            name: '青海',
            value: 2
        }, {
            name: '西藏',
            value: 1
        }, {
            name: '四川',
            value: 0
        }, {
            name: '宁夏',
            value: 4
        }, {
            name: '海南',
            value: 3
        }, {
            name: '台湾',
            value: 2
        }, {
            name: '香港',
            value: 1
        }, {
            name: '澳门',
            value: 0
        }]
    }]
};
myChart.on('click', function(params) {
    $.ajax({
        type: "post",
        url: "www.baidu.com",
        data: {
            name: params.name
        },
        dataType: "json",
        success: function(data) {
            alert("success");
        }
    });
});