Google地图路线规划

Google地图路线规划：
需求：给定的两点之间Google地图路径规划和详情。
代码实现：
 1 //map定义省略
 2 
 3 var directionsDisplay = new google.maps.DirectionsRenderer({ 'draggable': true ,suppressInfoWindows:true,suppressMarkers:true});
 4 
 5 var service;
 6 
 7 //得到规划路线
 8 function getRoute(source,destination,map){
 9     var directionsService = new google.maps.DirectionsService();
10     directionsDisplay.setMap(map);
11     var request = {
12         origin: source,
13         destination: destination,
14         travelMode: google.maps.TravelMode.DRIVING
15     };
16     directionsService.route(request, function (response, status) {
17         if (status == google.maps.DirectionsStatus.OK) {
18             directionsDisplay.setDirections(response);
19         }
20     });
21 }
22 
23 //得到规划路径的详细些信息
24 function getDetailsRoutes(source,destination,map){
25     service = new google.maps.DistanceMatrixService();
26     service.getDistanceMatrix({
27         origins: [source],
28         destinations: [destination],
29         travelMode: google.maps.TravelMode.DRIVING,
30         unitSystem: google.maps.UnitSystem.METRIC,
31         avoidHighways: false,
32         avoidTolls: false
33     }, function (response, status) {
34         if (status == google.maps.DistanceMatrixStatus.OK && response.rows[0].elements[0].status != "ZERO_RESULTS") {
35             var distance = response.rows[0].elements[0].distance.text;
36             var duration = response.rows[0].elements[0].duration.text;
37             var dvDistance = document.getElementById("siteinfo_modal_label");
38             dvDistance.innerHTML = "";
39             dvDistance.innerHTML += "Distance: " + distance + "<br />";
40             dvDistance.innerHTML += "Duration:" + duration;
41 
42         } else {
43             alert("Unable to find the distance via road.");
44         }
45     });