查询两个城市间的距离

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=gb2312"/>
    <title>Google 地图 计算两个城市之间的距离，非直线距离</title>
    <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>
    <script type="text/javascript">

//计算两地之间的距离，非直线距离
var directionDisplay;
var directionsService = new google.maps.DirectionsService();
var response;
var directionsDisplay = new google.maps.DirectionsRenderer();
//不走高速
function noGaosu(){ 
var start = document.feng.sc.value;
var end = document.feng.ec.value;
var request = {
avoidHighways: true,
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(
request, function(response, status){
if (status == google.maps.DirectionsStatus.OK){
directionsDisplay.setDirections(response);
//m= response.routes[0].legs[0].distance.text;
//alert(m);
var distance = document.getElementById('nodistance'); 
distance.innerHTML = '不走高速的距离: '+response.routes[0].legs[0].distance.text; 
}
}
);
}
//走高速
function gaosu(){ 
var start = document.feng.sc.value;
var end = document.feng.ec.value;
var request = {
avoidHighways: false,
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(
request, function(response, status){
if (status == google.maps.DirectionsStatus.OK){
directionsDisplay.setDirections(response);
//m= response.routes[0].legs[0].distance.text;
//alert(m);
var distance = document.getElementById('distance'); 
distance.innerHTML = '走高速的距离: '+response.routes[0].legs[0].distance.text; 
}
}
);
}

    </script>
  </head>
  <body onload="initialize()" onunload="GUnload()">
    <form name="feng">
<div id="map_canvas" style="width: 600px; height: 400px"></div>
    <b>查询两个城市间的距离：</b><br />
出发城市:&nbsp;<input type="text" id="sc" /><br />
到达城市:&nbsp;<input type="text" id="ec" /><br />
<input type="button" value="高    速" id="bt" onClick="gaosu()"/>
<input type="button" value="不走高速" id="bt" onClick="noGaosu()"/>
<div id="distance"></div> 
<div id="nodistance"></div>
</form>
  </body>
</html>
查询两个城市间的距离

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