我使用的google地图api如下所示:
this.init_map = function(lat, lng){
var mapOptions = {
center: new google.maps.LatLng(lat, lng),
zoom: 17,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
var marker = new google.maps.Ma