selectArea/liandong.html at master · leileibrother/selectArea · GitHub

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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>三级联动</title>
<style>
    div{
        width:500px;
        margin:0 auto;
        text-align:center;
    }
    select{
        width:140px;
    }
</style>
</head>
<body>
<div>
    <h1>三级联动</h1>
    <select id="province">
        <option value="省">省</option>
    </select>
    <select id="city">
        <option value="市">市</option>
    </select>
    <select id="country">
        <option value="县">县</option>
    </select>
</div>
<script type="text/javascript" src="jquery-1.11.3.js"></script>
<script src="city.js"></script>
<script>
var allCity = city.citylist;
$.each(allCity,function(i,n){
    //添加每一个省
    $("#province").append('<option value="'+ n.p +'">' + n.p + '</option>');
});
$("#province").change(function(){
    $("#country").show();
    //执行后面函数之前清空一下
    $("#city").html('<option value="市">市</option>');
    $("#country").html('<option value="县">县</option>');
    $.each(allCity,function(i,n){
        if($("#province").val()==n.p){
            $.each(n.c,function(a,b){
                //添加每一个市
                $("#city").append('<option value="'+ b.n + '">' + b.n + '</option>');
            });
        }
    });
});

$("#city").change(function(){
    //执行后面函数之前清空一下
    $("#country").html('<option value="县">县</option>');
    $.each(allCity,function(i,n){
        if($("#province").val()==n.p){
            $.each(n.c,function(a,b){
                if($("#city").val()==b.n){
                    if(b.a){
                        $.each(b.a,function(c,d){
                            //添加每一个县
                            $("#country").append('<option value="'+ d.s + '">' + d.s + '</option>');
                        })
                    }else{
                        $("#country").hide();
                    }
                }
            });
        }
    });
});
</script>
</body>
</html>