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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<select name="" id="" onchange="func(this)">
<option value="">--请选择--</option>
<option value="0">广东</option>
<option value="1">河南</option>
<option value="2">广西</option>
<option value="3">北京</option>
</select>省
<select name="" id="cid">
<option value="">--请选择--</option>
</select>市
</body>
<script>
var cid = document.getElementById('cid');
function func(obj){
// alert(obj);
// alert(obj.value);
val = obj.value;
//根据我们传递过来的value值来分配二维数组
city = [];
city[0] = ['广州','深圳','东莞','惠州','佛山','珠海','中山','汕头'];
city[1] = ['郑州','商丘','开封','新乡','洛阳'];
city[2] = ['南宁','桂林','北海','钦州','柳州'];
city[3] = ['朝阳','海淀','东城','西城','昌平','大兴','顺义'];
// city[0][0]=['越秀区','天河'];
// console.log(city);
// console.log(city[val][0])
// console.log(city[val][1])
// console.log(city[val][2])
// console.log(city[val][3])
// console.log(city[val][4])
// console.log(city[val][5])
// console.log(city[val][6])
// console.log(city[val][7])
// var op = new Option('钦州',0);
// console.log(op);
// cid.add(op);
//清空原来内容
cid.length = 1;
//循环创建option标签
for(var i = 0;i<city[val].length;i++){
//console.log(city[val][i]);
op = new Option(city[val][i],i);
//console.log(op);
cid.add(op);
}
}
</script>
</html>点击 "运行实例" 按钮查看在线实例
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