HTML5網頁定位，並將位置繪在百度地圖上

執行效果：
實現程式碼：
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>HTML5定位</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.7.2/jquery.min.js"></script>
    <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=wqBXfIN3HkpM1AHKWujjCdsi"></script>
    <script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/convertor.js"></script>
    <style type="text/css">
        * { margin: 0px; padding: 0px; }
        body { font: normal 100% Helvetica, Arial, sans-serif; text-align: center; height: 100%; overflow: hidden; }
        #allmap { width: 100%; height: 100%; position: absolute; }
    </style>
</head>
<body>
    <script type="text/javascript">
        $(function () {
            // 單次位置請求執行的函式             
            function getLocation() {
                if (navigator.geolocation) {
                    navigator.geolocation.getCurrentPosition(showPosition, locationError);
                } else {
                    alert("你的瀏覽器不支援 GeoLocation.");
                }
            }

            // 頁面載入時執行getLocation函式
            //window.onload = getLocation;

            $("#btn").click(function () {
                getLocation();
            });

            getLocation();
        });

        //定位成功時，執行的函式
        function showPosition(position) {
            var lon = position.coords.longitude;
            var lat = position.coords.latitude;
            // alert("您位置的經度是："+lon+" 緯度是："+lat);
            var map = new BMap.Map("allmap");
            var point = new BMap.Point("" + lon + "", "" + lat + "");
            map.centerAndZoom(point, 19);
            var gc = new BMap.Geocoder();
            translateCallback = function (point) {
                var marker = new BMap.Marker(point);
                map.addOverlay(marker);
                map.setCenter(point);
                gc.getLocation(point, function (rs) {
                    var addComp = rs.addressComponents;
                    if (addComp.province !== addComp.city) {
                        var sContent =
                                  "<div><h4 style='margin:0 0 5px 0;padding:0.2em 0'>你當前的位置是：</h4>" +
                                  "<p style='margin:0;line-height:1.5;font-size:13px;text-indent:2em'>" + addComp.province + ", " + addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber + "</p>" +
                                  "</div>";
                    }
                    else {
                        var sContent =
                                  "<div><h4 style='margin:0 0 5px 0;padding:0.2em 0'>你當前的位置是：</h4>" +
                                  "<p style='margin:0;line-height:1.5;font-size:13px;text-indent:2em'>" + addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber + "</p>" +
                                  "</div>";
                    }
                    var infoWindow = new BMap.InfoWindow(sContent);
                    map.openInfoWindow(infoWindow, point);
                });
            }
            BMap.Convertor.translate(point, 0, translateCallback);
        }
        // 定位失敗時，執行的函式
        function locationError(error) {
            switch (error.code) {
                case error.PERMISSION_DENIED:
                    alert("User denied the request for Geolocation.");
                    break;
                case error.POSITION_UNAVAILABLE:
                    alert("Location information is unavailable.");
                    break;
                case error.TIMEOUT:
                    alert("The request to get user location timed out.");
                    break;
                case error.UNKNOWN_ERROR:
                    alert("An unknown error occurred.");
                    break;
            }
        }
    </script>
    <input type="button" value="網頁定位-獲取我的位置" id="btn" style="padding: 10px 20px; font-size: 120%;
        margin: 20px;" />
    <div id="allmap">
    </div>
</body>
</html>
HTML5網頁定位，並將位置繪在百度地圖上

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