谷歌地图导航从用户位置开始

我有一个网站，客户在网站上有自己的个人资料。他们的个人资料上都有一张地图。当有人浏览他们的个人资料时，我希望他们能够按下这些按钮，通过汽车、公共交通或步行获取路线。\n这些按钮是可用的，并且我可以获取到用户的地理位置。但问题是，出于某种原因，从来没有找到过路线。\nJS代码有什么问题吗？\n

$.get("http://maps.google.no/maps/api/geocode/json?address={{ $company -> forretningsadresse_adresse  }}, {{ $company -> forretningsadresse_postnummer }} {{ $company -> forretningsadresse_poststed }}", function(data) {
            var mapStyle = [];
            var pos = new google.maps.LatLng(data["results"][0]["geometry"]["location"]["lat"], data["results"][0]["geometry"]["location"]["lng"]);
            var myOptions = {
                zoom: 15,
                center: pos,
                mapTypeId: google.maps.MapTypeId.ROADMAP,
                styles: mapStyle,
                scrollwheel: true
            };
            map = new google.maps.Map(document.getElementById('map'), myOptions);
            directionsDisplay = new google.maps.DirectionsRenderer();
            directionsDisplay.setMap(map);
            var marker = new google.maps.Marker({
                position: pos,
                map: map,
                animation: google.maps.Animation.DROP,
                title: '位置'
            });
            mapsBusinessPosition = pos;
        });
        function initMap(pos) {
            var directionsDisplay;
            directionsService = new google.maps.DirectionsService();
            var mapStyle = [];
            var myOptions = {
                zoom: 15,
                center: pos,
                mapTypeId: google.maps.MapTypeId.ROADMAP,
                styles: mapStyle,
                scrollwheel: true
            };
            map = new google.maps.Map(document.getElementById('map'), myOptions);
            directionsDisplay = new google.maps.DirectionsRenderer();
            directionsDisplay.setMap(map);
            var marker = new google.maps.Marker({
                position: pos,
                map: map,
                animation: google.maps.Animation.DROP,
                title: '位置'
            });
            mapsBusinessPosition = pos;
        }
        function getDirections(mode) {
            $("#tripDuration").html("加载中...");
            var userLocation;
            if (navigator.geolocation) {
                navigator.geolocation.getCurrentPosition(function(position) {
                    userLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
                    var request = {
                        origin: userLocation,
                        destination: mapsBusinessPosition,
                        travelMode: mode
                    };
                    directionsService.route(request, function(result, status) {
                        if (status == google.maps.DirectionsStatus.OK) {
                            directionsDisplay.setDirections(result);
                            $("#tripDuration").html(result.routes[0].legs[0].duration.text);
                        } else {
                            $("#tripDuration").html("未找到路线");
                        }
                    });
                }, function() {
                    alert("出错了！");
                });
            }
            else {
                alert("出错了！");
            }
        }

\n这是按钮。\n

\n噢，地图乍一看没问题，只是导航方向不起作用。\n那我做错了什么？\n提前谢谢。