Http 站点未检测到 Chrome 中的位置 - 问题

Example : https://www.whatismyzip.com/ works well where as http://www.mapdevelopers.com/what-is-my-zip-code.php does'nt work.

  <script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAdGQKI4sEj5TZAjNCds422V_ZHevD45Fo"></script>
 <%--   <script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"></script>--%>

 <%--     <script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>
 <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>--%>
    <script type="text/javascript">


        function ShowMessages() {

            debugger;
            if (navigator.geolocation) {
                navigator.geolocation.getCurrentPosition(success);
            } else {
                alert("Geo Location is not supported on your current browser!");
            }
            function success(position) {
                debugger;
                var lat = position.coords.latitude;
                var lng = position.coords.longitude;
                var latlng = new google.maps.LatLng(lat, lng);
                var geocoder = geocoder = new google.maps.Geocoder();
                geocoder.geocode({ 'latLng': latlng }, function (results, status) {
                    if (status == google.maps.GeocoderStatus.OK) {
                        if (results[1]) {

                            var searchAddressComponents = results[0].address_components,
                             searchPostalCode = "";
                            $.each(searchAddressComponents, function () {
                                if (this.types[0] == "postal_code") {
                                    searchPostalCode = this.short_name;
                                }
                            });

                            document.getElementById('hidden1').value = searchPostalCode
                            __doPostBack('', '');


                        }
                    }
                });
            }

        }

任何帮助/解决方法将不胜感激.