<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
//示例数据，数据的不同，获取数据的方法是不同的
var data = { "浙江省": { "湖州市": ["德清县","长兴县","安吉县","吴兴区","南浔区"], "杭州市": ["上城区", "下城区", "西湖区"] },
"河南省": {"洛阳市":["孟津县","新安县","栾川县"],"新乡市":["新乡县","获嘉县","长垣县","封丘县"],"周口市":["鹿邑县","太康县","郸城县","淮阳县"]},
"北京市": {"北京市":["昌平区","海淀区","怀柔县","延庆县"]}
};
window.onload = function () {
//填充省数据
for (p in data) {
var sheng = document.getElementById("province");
sheng.options[sheng.options.length] = new Option(p, p);
}
setCity()
}
function setCity()
{
var sheng = document.getElementById("province");
var shi = document.getElementById("city");
shi.options.length = 0;
var selected_sheng = sheng.options[sheng.selectedIndex].value;
for (c in data[selected_sheng]) {
shi.options[shi.options.length] = new Option(c, c);
}
setCountry()
}
function setCountry() {
var sheng = document.getElementById("province");
var shi = document.getElementById("city");
var xian = document.getElementById("country");
var selected_sheng = sheng.options[sheng.selectedIndex].value;
var selected_shi = shi.options[shi.selectedIndex].value;
var xianArray = data[selected_sheng][selected_shi];
xian.options.length = 0;
for (i = 0; i < xianArray.length;i++ ) {
xian.options[xian.options.length] = new Option(xianArray[i], xianArray[i]);
}
}
</script>
</head>
<body>
<form>
选择省：<select id="province" onchange="setCity()"></select>
选择市：<select id="city" onchange="setCountry()"></select>
选择区县：<select id="country"></select>
</form>
</body>
</html>
省市县联动（转）