map = new GMap2(document.getElementById("map"));
//移動/縮放地圖
map.addControl(new GLargeMapControl());
map.enableScrollWheelZoom(); //允許鼠標滾輪放大和縮小
map.size
GEvent.addDomListener(map, "zoomstart", wheelZoom);
GEvent.addDomListener(map, "zoomend", wheelZoom);
//在地圖和衛星模式之間切換
map.addControl(new GMapTypeControl());
//地圖中心定位
var x = 39.63047356847389, y = 118.18040370941162;
var center = new GLatLng(x, y)
map.setCenter(center, 12);
切換區域用
map.panTo(new GLatLng(x,y));