测试代码如下，具体操作见截图
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
</body>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html {width: 100%;height: 100%; margin:0;font-family:"微软雅黑";}
#l-map{height:100%;width:100%;}
#r-result{width:100%; font-size:14px; height:50px;top:30px}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=密钥"></script>
<!-- <script type="text/javascript" src="js/convertor.js"></script> -->
<title>驾车导航的数据接口</title>
</head>
<body>
<div id="l-map"></div>
<!-- <div id="r-result"></div> -->
<div id="r-result">
<input type="button" onclick="remove_overlay();" value="删除覆盖物" />
</div>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
var map = new BMap.Map("l-map");
map.centerAndZoom(new BMap.Point(116.404, 39.915), 15);
var marker = new BMap.Marker(new BMap.Point(116.404, 39.915)); // 创建点
var polyline = new BMap.Polyline([
new BMap.Point(116.399, 39.910),
new BMap.Point(116.405, 39.920),
new BMap.Point(116.425, 39.900)
], {strokeColor:"blue", strokeWeight:2, strokeOpacity:0.5}); //创建折线
polyline.disableMassClear();
map.addOverlay(polyline);
polyline = new BMap.Polyline([
new BMap.Point(116.398, 39.910),
new BMap.Point(116.404, 39.920),
new BMap.Point(116.424, 39.900)
], {strokeColor:"blue", strokeWeight:2, strokeOpacity:0.5});
map.addOverlay(polyline);
//清除覆盖物
function remove_overlay(){
/* var allOverlay = map.getOverlays();
for (var i = 0; i < allOverlay.length; i++) {
if (allOverlay[i].toString() == "[object Polyline]") {
map.removeOverlay(allOverlay[i]);
}
} */
map.clearOverlays();
}
</script>
