function alertGeo() {
    navigator.geolocation.getCurrentPosition(onSuccess, onError);
    function onSuccess(position) {
        codeLatLng(position.coords.latitude,position.coords.longitude);
    }
    function onError(error) {
        alert(JSON.stringify(error));
    }
}


function codeLatLng(lat,lng) {

      var latlng = new google.maps.LatLng(lat, lng);
      geocoder = new google.maps.Geocoder();
      geocoder.geocode({'latLng': latlng}, function(results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
          if (results[1]) {
           alert("Address: " + results[1].formatted_address);

          } else {
            alert('No results found');
          }
        } else {
          alert('Geocoder failed due to: ' + status);
        }
      });
    }