<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script type="text/javascript" language="javascript">
var citys = new Array();
citys["广东"] = ["汕头","揭阳","潮州"];
citys["湖南"] = ["长沙","益阳","张家界"];
function showCitys(){
//清除市区下拉列表的选项
document.getElementById("city").length=0;
//获取省份下拉列表选中的值
var pro = document.getElementById("province").value;
//将对应的市区添加到市区下拉列表
for(var city in citys[pro]){
var c = new Option(citys[pro][city],citys[pro][city]);
document.getElementById("city").options.add(c);
}
}
</script>
</head>
<body>
省：<select id="province" onchange="showCitys();">
<option value="">请选择省份</option>
<option value="广东">广东</option>
<option value="湖南">湖南</option>
</select>
<br />
市：<select id="city">
</select>
</body>
</html>