bug出现了，谁能告诉我这是怎么回事，求指教
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title> 我的地图</title>
<link rel="stylesheet" type="text/css" href=" bootstrap.min.css">
<style >
body{
padding-top:80px;
}
#add-btn{
margin-top: 20px;
}
#main{
height: 500px;
}
</style>
</head>
<body>
<div>
<div>
<div class="col-md-4 col-md-offset-3">
<form>
<input id="place-input" type="text" value="" placeholder="请输入地址">
<button type="button" id="add-btn" class="btn btn-success">
查询
</button>
</form>
</div>
<div>
<div id="main"></div>
</div>
</div>
</div>
<script src="jquery.min.js"></script>
<script src="echarts.min.js"></script>
<script src="china.js"></script>
<script>
var mymiyao="fHrNQj6DHTjZtfTvfqbsuvTzKc5V9SBl";
var inp=$("#place-input");
var btn=$("#add-btn");
var url='http://api.map.baidu.com/geocoder/v2/?output=json&ak='+mymiyao+' &address=';
btn.click(function(){
var place=inp.val();
if(place){
$.getJSON(url+place+'&callback=?',function(res){
if(res.status===0){
console.log(place,res.result);
}else{
alert('没找到地址信息');
}
})
}
})
</script>
</body>
</html>
