转自：http://hi.baidu.com/hackerbase/item/0a54b12d0005690e72863e3c
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>驾车途经点</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.2"></script>
</head>
<body>
<p><input type='button' value='开始' onclick='run();' /></p>
<div style="width:820px;height:500px;border:1px solid gray" id="container"></div>
<script type="text/javascript">
var map = new BMap.Map("container");
map.centerAndZoom(new BMap.Point(116.404, 39.915), 13);
map.addControl(new BMap.NavigationControl()); // 添加平移缩放控件
map.addControl(new BMap.ScaleControl()); // 添加比例尺控件
map.addControl(new BMap.OverviewMapControl()); //添加缩略地图控件
var myP1 = new BMap.Point(106.521436,29.532288); //起点-重庆
var myP2 = new BMap.Point(108.983569,34.285675); //终点-西安
var myP3 = new BMap.Point(116.404449,39.920423); //终点-北京
window.run = function (){
map.clearOverlays(); //清除地图上所有的覆盖物
var driving = new BMap.DrivingRoute(map); //创建驾车实例
driving.search(myP1, myP2); //第一个驾车搜索
driving.search(myP2, myP3); //第二个驾车搜索
driving.setSearchCompleteCallback(function(){
var pts = driving.getResults().getPlan(0).getRoute(0).getPath(); //通过驾车实例，获得一系列点的数组
var polyline = new BMap.Polyline(pts);
map.addOverlay(polyline);
var m1 = new BMap.Marker(myP1); //创建3个marker
var m2 = new BMap.Marker(myP2);
var m3 = new BMap.Marker(myP3);
map.addOverlay(m1);
map.addOverlay(m2);
map.addOverlay(m3);
var lab1 = new BMap.Label("起点",{position:myP1}); //创建3个label
var lab2 = new BMap.Label("途径点",{position:myP2});
var lab3 = new BMap.Label("终点",{position:myP3});
map.addOverlay(lab1);
map.addOverlay(lab2);
map.addOverlay(lab3);
setTimeout(function(){
map.setViewport([myP1,myP2,myP3]); //调整到最佳视野
},1000);
});
}
</script>
</body>
</html>