<html>
<head>
<title>无标题文档</title>
<script type="text/javascript" language="javascript">
var city[
["南充","成都"],//四川
["南京","苏州"],//江苏
];
function getCity(){
//获得省份和城市下拉列表框的引用
var sltProvince=document.forms["myform"].elements["province"];
var sltCity=document.forms["myform"].elements["City"];
//得到对应省份的城市列表数组
var provinceCity=city[sltProvince.selectedIndex-1];
//将城市下拉列表框清空，仅有第一个提示选项
city.length=1;
//将相应省市的城市填充到城市选择框中
for(var i=0;i<provinceCity.length;i++){
//创建新的Option对象并将其添加到城市下拉列表框中
sltCity[i+1]=new Option(provinceCity[i],pcity[i]);
}
}
</script>
</head>
<body>
<tr>
<td align="right">
Address
</td>
<td >
<select name="province" onChange="getCity()">
<option value="0">请选择你所在的省份(市)</option>
<option value="四川">四川</option>
<option value="江苏">江苏</option>
</select>
<select name="City">
<option value="0">请选择你所在的城市</option>
</select>
</td>
</tr>
</body>
</html>