Javascript计算两个marker之间的距离(Google Map V3)

var oldMarker = new google.maps.Marker({ 
position: new google.maps.LatLng("31.95678", "177.898673"), 
map: map, 
title:"old" 
}); 
var newMarker = new google.maps.Marker({ 
position: new google.maps.LatLng("31.45678", "177.098673"), 
map: map, 
title:"new" 
}); 
 
2.加载geometry库 
 代码如下:

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&libraries=geometry"></script> 
 
说明：libraries=geometry 
3.计算距离 
 代码如下:

var meters = google.maps.geometry.spherical.computeDistanceBetween(oldMarker.getPosition(), newMarker.getPosition()); 
document.getElementById("distance").innerText = meters+"米"; 
 
说明：单位是米 
oldMarker.getPosition() 获取oldmarker的当前位置(经纬度)