原生态的JavaScript对DOM的操作 比jquery更方便，特别是当没有id 或class 可以获取的时候，只有用tag名获取
HTML DOM Element 对象操作 http://www.w3school.com.cn/jsref/dom_obj_all.asp
百度开放平台 ：http://lbsyun.baidu.com/index.php?title=open/library&qq-pf-to=pcqq.group
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
#container{
font-size:12px;
margin:5px 0;
}
</style>
<title>
城市列表显示示例</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.4"></script>
<script type="text/javascript" src="http://api.map.baidu.com/library/CityList/1.4/src/CityList_min.js"></script>
</head>
<body>
<div id="container"></div>
<div style="width:520px;height:340px;border:1px solid gray" id="map_container"></div>
<button type="button" onclick="displayDate()">show</button>
<div id="demo"></div>
</body>
</html>
<script type="text/javascript">
// 新创建地图
var map = new BMap.Map("map_container");
map.centerAndZoom(new BMap.Point(121.478125,31.229649), 12);
var cityList = new BMapLib.CityList({
container: ‘container‘,
map: map
});
cityList.getBusiness(‘中关村‘, function(json){
console.log(‘商圈‘);
console.log(json);
});
cityList.getSubAreaList(131, function(json){
console.log(‘城市列表‘);
console.log(json);
});
cityList.addEventListener(‘cityclick‘, function(e){
console.log(e);
});
function displayDate(){
var areaindex = 16;
var b = document.getElementsByTagName(‘select‘)[2].childNodes[areaindex];
var c = document.getElementsByTagName(‘select‘)[3].childNodes;
var txt =‘‘;
for (i=1; i<c.length; i++)
{
if(i<c.length-1){
txt +=‘(\‘‘+c[i].value +‘\‘‘+ ‘,‘ +‘\‘‘+c[i].text+‘\‘‘+‘,‘+‘\‘‘+b.value+‘\‘‘+‘),‘+‘<br>‘;
}else{
txt +=‘(\‘‘+c[i].value +‘\‘‘+ ‘,‘ +‘\‘‘+c[i].text+‘\‘‘+‘,‘+‘\‘‘+b.value+‘\‘‘+‘)‘+‘<br>‘;
}
};
var x=document.getElementById("demo");
x.innerHTML=txt;
}
</script>
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><style type="text/css"> #container{ font-size:12px; margin:5px 0; }</style><title>城市列表显示示例</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.4"></script><script type="text/javascript" src="http://api.map.baidu.com/library/CityList/1.4/src/CityList_min.js"></script>
</head><body><div id="container"></div><div style="width:520px;height:340px;border:1px solid gray" id="map_container"></div>
<button type="button" onclick="displayDate()">show</button>
<div id="demo"></div></body></html><script type="text/javascript">// 新创建地图var map = new BMap.Map("map_container");map.centerAndZoom(new BMap.Point(121.478125,31.229649), 12);
var cityList = new BMapLib.CityList({ container: ‘container‘, map: map});
cityList.getBusiness(‘中关村‘, function(json){ console.log(‘商圈‘); console.log(json);});
cityList.getSubAreaList(131, function(json){ console.log(‘城市列表‘); console.log(json); });
cityList.addEventListener(‘cityclick‘, function(e){ console.log(e);});
function displayDate(){
var areaindex = 16;
var b = document.getElementsByTagName(‘select‘)[2].childNodes[areaindex];
var c = document.getElementsByTagName(‘select‘)[3].childNodes;
var txt =‘‘;
for (i=1; i<c.length; i++) { if(i<c.length-1){ txt +=‘(\‘‘+c[i].value +‘\‘‘+ ‘,‘ +‘\‘‘+c[i].text+‘\‘‘+‘,‘+‘\‘‘+b.value+‘\‘‘+‘),‘+‘<br>‘; }else{
txt +=‘(\‘‘+c[i].value +‘\‘‘+ ‘,‘ +‘\‘‘+c[i].text+‘\‘‘+‘,‘+‘\‘‘+b.value+‘\‘‘+‘)‘+‘<br>‘; } }; var x=document.getElementById("demo"); x.innerHTML=txt;
}
</script>