Echarts地图高级开发：下钻交互菜单操作按钮(1)

        #menu {
            width: 180px;
            position: relative;
            top: 50px;
        }

<!--交互菜单-->
<div id="menu">
    <span><a href="#" onclick="getCity('shanghai', '上海');">上海</a></span>
    <span><a href="#" onclick="getCity('hebei', '河北');">河北</a></span>
    <span><a href="#" onclick="getCity('neimenggu', '内蒙古');">内蒙古</a></span>
    <span><a href="#" onclick="getCity('zhejiang', '浙江');">浙江</a></span>
</div>

//构建交互操作菜单;by poleng 2020.09.10
function getCity(provinces, provincesText) {
    //显示返回按钮;
    $('#back').removeClass('hidden');
    mapName = provincesText;
    //显示选择的省份;
    if (provinces) {
        showProvince(provinces, provincesText);
    }
}