HTML5获取地理坐标

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>基于浏览器的HTML5查找地理位置</title>

<script src="http://api.map.baidu.com/api?v=1.2" type="text/javascript"></script>
<script>

function getLocation(){
var options={
enableHighAccuracy:true,
maximumAge:1000
}
if(navigator.geolocation){
//浏览器支持geolocation
navigator.geolocation.getCurrentPosition(onSuccess,onError,options);

}else{
//浏览器不支持geolocation
}
}

//成功时
function onSuccess(position){
var longitude =position.coords.longitude;
var latitude = position.coords.latitude;
var map =new BMap.Map("container");
//创建一个坐标
var point =new BMap.Point(longitude,latitude);
//地图初始化，设置中心点坐标和地图级别
map.centerAndZoom(point,20);

}

//失败时
function onError(error){
switch(error.code){
case 1:
alert("位置服务被拒绝");
break;

case 2:
alert("暂时获取不到位置信息");
break;

case 3:
alert("获取信息超时");
break;

case 4:
alert("未知错误");
break;
}

}

window.onload=getLocation;
</script>
</head>
<body>