<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>聯動菜單</title>
<script>
function changle(){
var area = [
['浦東','普陀','徐匯','陸家嘴'],
['合肥','淮南','蕪湖','馬鞍山']
];
var select = document.getElementById('prov');
var opt = '';
for(var i=0;i<area[select.value].length;i++){
opt = opt + '<option value="'+ i +'">' + area[select.value][i] + '</option>'
}
document.getElementById('city').innerHTML = opt;
}
</script>
</head>
<body>
<select id="prov" οnclick="changle()">
<option value="-1" style="display:none" selected>請選擇</option>
<option value="0">上海</option>
<option value="1">安徽</option>
</select>
<select name="" id="city"></select>
</body>
</html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>聯動菜單</title>
<script>
function changle(){
var area = [
['浦東','普陀','徐匯','陸家嘴'],
['合肥','淮南','蕪湖','馬鞍山']
];
var select = document.getElementById('prov');
var opt = '';
for(var i=0;i<area[select.value].length;i++){
opt = opt + '<option value="'+ i +'">' + area[select.value][i] + '</option>'
}
document.getElementById('city').innerHTML = opt;
}
</script>
</head>
<body>
<select id="prov" οnclick="changle()">
<option value="-1" style="display:none" selected>請選擇</option>
<option value="0">上海</option>
<option value="1">安徽</option>
</select>
<select name="" id="city"></select>
</body>
</html>
