A：請自己綁定mouseover事件，利用UMarker.getPoint()來取得經緯度座標，並設定marker info的位置。
var map;
function init() {
map = new UMap(document.getElementById('map'));
map.centerAndZoom(new ULatLng(25.035405, 121.520255), 9);
var mapDiv = document.getElementById('map');
var marker = new UMarker(map.getCenter());
bindMaukerMouseover(marker, 'this is a string!');
map.addOverlay(marker);
var marker2 = new UMarker(new ULatLng(25.033405, 121.523255));
bindMaukerMouseover(marker2, 'this is another string!');
map.addOverlay(marker2);
//My marker info Div
var myMarkerInfoDiv = document.createElement('div');
myMarkerInfoDiv.id = 'myMarkerInfoDiv';
myMarkerInfoDiv.style.cssText = 'width:200px;border:1px solid blue;display:none;position:absolute;background-color:#CCC;';
document.getElementById('map').appendChild(myMarkerInfoDiv);
}
榜定marker的mouseover事件
function bindMaukerMouseover(mkr, msg){
mkr.addListener('mouseover', function(){
var latlng = mkr.getPoint();//取得該座標的經緯度
var point = map.transformLatLngToContainerCoordinates(latlng);//將經緯度轉成螢幕座標（相對於mapDiv左上角）
var exX = 15;//x偏差量
var exY = 10;//y偏差量
document.getElementById('myMarkerInfoDiv').style.left = (point.x + exX) + 'px';
document.getElementById('myMarkerInfoDiv').style.top = (point.y + exY) + 'px';
document.getElementById('myMarkerInfoDiv').style.display = 'block';
document.getElementById('myMarkerInfoDiv').innerHTML = msg;
});
mkr.addListener('mouseout', function(){
document.getElementById('myMarkerInfoDiv').style.display = 'none';
});
}