JS获取当前地理位置的方法

var getLocation = function (successFunc, errorFunc) { 
 //successFunc获取定位成功回调函数，errorFunc获取定位失败回调
 //首先设置默认城市
 var defCity = {
 id: '000001',
 name: '北京市',
 date: curDateTime()//获取当前时间方法
 };
 //默认城市
 $.cookie('VPIAO_MOBILE_DEFAULTCITY', JSON.stringify(defCity), { expires: 1, path: '/' });
 if (navigator.geolocation) {
 navigator.geolocation.getCurrentPosition(function (position) {
 var lat = position.coords.latitude;
 var lon = position.coords.longitude;
 //var map = new BMap.Map("container"); // 创建Map实例
 var point = new BMap.Point(lon, lat); // 创建点坐标
 var gc = new BMap.Geocoder();
 gc.getLocation(point, function (rs) {
 var addComp = rs.addressComponents;
 var curCity = {
 id: '',
 name: addComp.province,
 date: curDateTime()
 };
 //当前定位城市
 $.cookie('VPIAO_MOBILE_CURRENTCITY', JSON.stringify(curCity), { expires: 7, path: '/' });
 //alert(addComp.province + ", " + addComp.city + ", " + addComp.district + ", " + addComp.street);
 if (successFunc != undefined)
 successFunc(addComp);
 });
 },
 function (error) {
 switch (error.code) {
 case 1:
 alert("位置服务被拒绝。");
 break;
 case 2:
 alert("暂时获取不到位置信息。");
 break;
 case 3:
 alert("获取位置信息超时。");
 break;
 default:
 alert("未知错误。");
 break;
 }
 var curCity = {
 id: '000001',
 name: '北京市',
 date: curDateTime()
 };
 //默认城市
 $.cookie('VPIAO_MOBILE_DEFAULTCITY', JSON.stringify(curCity), { expires: 1, path: '/' });
 if (errorFunc != undefined)
 errorFunc(error);
 }, { timeout: 5000, enableHighAccuracy: true });
 } else {
 alert("你的浏览器不支持获取地理位置信息。");
 if (errorFunc != undefined)
 errorFunc("你的浏览器不支持获取地理位置信息。");
 }
};
var showPosition = function (position) {
 var lat = position.coords.latitude;
 var lon = position.coords.longitude;
 //var map = new BMap.Map("container"); // 创建Map实例
 var point = new BMap.Point(lon, lat); // 创建点坐标
 var gc = new BMap.Geocoder();
 gc.getLocation(point, function (rs) {
 var addComp = rs.addressComponents;
 var curCity = {
 id: '',
 name: addComp.province,
 date: curDateTime()
 };
 //当前定位城市
 $.cookie('VPIAO_MOBILE_CURRENTCITY', JSON.stringify(curCity), { expires: 7, path: '/' });
 //alert(addComp.province + ", " + addComp.city + ", " + addComp.district + ", " + addComp.street);
 });
};
var showPositionError = function (error) {
 switch (error.code) {
 case 1:
 alert("位置服务被拒绝。");
 break;
 case 2:
 alert("暂时获取不到位置信息。");
 break;
 case 3:
 alert("获取位置信息超时。");
 break;
 default:
 alert("未知错误。");
 break;
 }
 var curCity = {
 id: '000001',
 name: '北京市',
 date: curDateTime()
 };
 //默认城市
 $.cookie('VPIAO_MOBILE_DEFAULTCITY', JSON.stringify(curCity), { expires: 1, path: '/' });
};

<script>
var url = 'http://chaxun.1616.net/s.php?type=ip&output=json&callback=?&_=' + Math.random();
 $.getJSON(url, function(data) {
 alert(data.Ip);
 });
</script>