运行以下代码即可
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>IP定位获取当前城市</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=LjEVnz1queNkEUxV5SMB2Fas"></script>
<script type="text/javascript">
var myCity = new BMap.LocalCity();
myCity.get(myFun);
function myFun(result){
var cityName = result.name;
alert("您所在的城市: "+cityName);
}
</script>
</head>
<body>
</body>
</html>原文：http://www.cnblogs.com/small-pig/p/4615236.html