用javascript进行地理定位

if (navigator.geolocation) {
  // Geolocation API可用
} else {
  // Geolocation API不可用
}

navigator.geolocation.getCurrentPosition(successCallback, errorCallback, options);

function successCallback(position) {
  var latlng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
  var myOptions = {
    zoom: 15,
    center: latlng,
    mapTypeControl: false,
    navigationControlOptions: {style: google.maps.NavigationControlStyle.SMALL},
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
  var marker = new google.maps.Marker({
    position: latlng,
    map: map,
    title:"You are here!"
  });
}

function errorCallback(error) {
  // 处理获取位置信息失败的情况
}

navigator.geolocation.getCurrentPosition(successCallback, errorCallback);