<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>js省市二级联动</title>
</head>
<body>
<form name="aform" method="get" action="#">
省份：<select id="province" name="province" onchange="changeProvince(this.selectedIndex)"></select>
城市：<select id="city" name="city"></select>
</form>
</body>
</html>
<script type="text/javascript">
var provinces=["请选择省份","北京市","天津市","上海市","重庆市","江苏省","浙江省","江西省","海南省"];
var citys=[
["请选择城市"],
["北京市"],
["天津市"],
["上海市"],
["重庆市"],
["南京市","无锡市","徐州市","常州市","苏州市","南通市","连云港市","淮安市","盐城市","扬州市","镇江市","泰州市","宿迁市"],
["杭州市","宁波市","温州市","绍兴市","湖州市","嘉兴市","金华市","衢州市","台州市","丽水市","舟山"],
["南昌市","九江市","上饶市","抚州市","宜春市","吉安市","赣州市","景德镇","萍乡市","新余市","鹰潭市"],
["海口市","三亚市","三沙市","儋州市"]
];
window.onload=function(){
var province=document.getElementById("province");
var city=document.getElementById("city");
var index=0;
//创建好后加入到列表中
for(var i in provinces)
{
var option = document.createElement("option");
option.text=provinces[i];
option.value=provinces[i];
province.appendChild(option);
}
var option = document.createElement("option");
option.text=citys[index];
option.value=citys[index];
city.appendChild(option);
}
function changeProvince(selectedIndex){
var city=document.getElementById("city");
city.options.length=0;
for(var i in citys[selectedIndex])
{
var option = document.createElement("option");
option.text=citys[selectedIndex][i];
option.value=citys[selectedIndex][i];
city.appendChild(option);
}
}
</script>
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