jquery实现户籍地选择下拉框

利用jquery实现户籍地选择下拉框的具体代码，供大家参考，具体内容如下

data.js

var data = [{
        provname: '浙江省',
        provId: 1,
        citys: [{
            cityname: "杭州市",
            cityId: 101,
            areas: [{
                    areaname: "杭州一区",
                    areaId: 1011
                },
                {
                    areaname: "杭州二区",
                    areaId: 1012
                }
            ]
        }, {
            cityname: "温州市",
            cityId: 102,
            areas: [{
                areaname: '温州一区',
                areaId: 1021
            }, {
                areaname: '温州二区',
                areaId: 1022
            }]
        }, {
            cityname: "宁波市",
            cityId: 103,
            areas: [{
                areaname: '宁波一区',
                areaId: 1031
            }, {
                areaname: '宁波二区',
                areaId: 1032
            }]

        }, {
            cityname: "绍兴市",
            cityId: 104,
            areas: [{
                areaname: '绍兴一区',
                areaId: 1041
            }, {
                areaname: '绍兴二区',
                areaId: 1042
            }]

        }]
    }, {
        provname: '山东省',
        provId: 2,
        citys: [{
            cityname: "济南市",
            cityId: 201,
            areas: [{
                    areaname: "济南一区",
                    areaId: 2011
                },
                {
                    areaname: "济南二区",
                    areaId: 2012
                }
            ]
        }, {
            cityname: "青岛市",
            cityId: 202,
            areas: [{
                areaname: '青岛一区',
                areaId: 2021
            }, {
                areaname: '青岛二区',
                areaId: 2022
            }]
        }, {
            cityname: "济宁市",
            cityId: 203,
            areas: [{
                areaname: '济宁一区',
                areaId: 2031
            }, {
                areaname: '济宁二区',
                areaId: 2032
            }]

        }, {
            cityname: "潍坊市",
            cityId: 204,
            areas: [{
                areaname: '潍坊一区',
                areaId: 2041
            }, {
                areaname: '潍坊二区',
                areaId: 2042
            }]

        }]
    },
    {
        provname: '广东省',
        provId: 3,
        citys: [{
            cityname: "广州市",
            cityId: 301,
            areas: [{
                    areaname: "广州一区",
                    areaId: 3011
                },
                {
                    areaname: "广州二区",
                    areaId: 3012
                }
            ]
        }, {
            cityname: "潮阳市",
            cityId: 302,
            areas: [{
                areaname: '潮阳一区',
                areaId: 3021
            }, {
                areaname: '潮阳二区',
                areaId: 3022
            }]
        }, {
            cityname: "澄海市",
            cityId: 303,
            areas: [{
                areaname: '澄海一区',
                areaId: 3031
            }, {
                areaname: '澄海二区',
                areaId: 3032
            }]

        }, {
            cityname: "潮州市",
            cityId: 304,
            areas: [{
                areaname: '潮州一区',
                areaId: 3041
            }, {
                areaname: '潮州二区',
                areaId: 3042
            }]

        }]
    },
    {
        provname: '甘肃省',
        provId: 4,
        citys: [{
            cityname: "兰州市",
            cityId: 401,
            areas: [{
                    areaname: "兰州一区",
                    areaId: 4011
                },
                {
                    areaname: "兰州二区",
                    areaId: 4012
                }
            ]
        }, {
            cityname: "白银市",
            cityId: 402,
            areas: [{
                areaname: '白银一区',
                areaId: 4021
            }, {
                areaname: '白银二区',
                areaId: 4022
            }]
        }, {
            cityname: "敦煌市",
            cityId: 403,
            areas: [{
                areaname: '敦煌一区',
                areaId: 4031
            }, {
                areaname: '敦煌二区',
                areaId: 4032
            }]

        }, {
            cityname: "定西市",
            cityId: 404,
            areas: [{
                areaname: '定西一区',
                areaId: 4041
            }, {
                areaname: '定西二区',
                areaId: 4042
            }]

        }]
    }
]

demo.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="js/jquery.min.js"></script>
    <script src="js/data.js"></script>
</head>
<body>
    <!-- 先添加三个下拉列表 -->
    <select name="prov" id="prov">

    </select>
    <select name="city" id="city">

    </select>
    <select name="area" id="area">

    </select>

    <script>
        var $prov=$("#prov")
        var $city=$("#city")
        var $area=$("#area")

        $(function(){
            //页面加载完成后触发
            $.each(data,function(i,e){
                $prov.append('<option value="'+e.provId+'">'+e.provname+'</option>')   //在$obj的末尾追加子元素newObj

            })
            $prov.prepend('<option value=""  selected>请选择</option>');
            //当省名被选择时，触发以下事件
            $prov.on("change",function(){
                //遍历省
                $.each(data,function(i,e){
                    if($prov.val()==e.provId){
                        //遍历市
                        $city.html('<option value="">请选择</option>');//用来清空之前选择的市
                        $.each(e.citys,function(i,e2){
                            $city.append('<option value="'+e2.cityId+'">'+e2.cityname+'</option>');
                        })

                    }

                })
            })

            //当市名被选择时，触发以下事件
            $city.on("change",function(){
                //遍历省
                $.each(data,function(i,e){
                    if($prov.val()==e.provId){
                        $.each(e.citys,function(i,e2){
                            if($city.val()==e2.cityId){
                                $area.html('<option value="">请选择</option>');
                                $.each(e2.areas,function(i,e3){
                                    $area.append('<option value="'+e3.areaId+'">'+e3.areaname+'</option>');
                                })
                            }
                        })
                    }
                })

            })

        })

    </script>
</body>
</html>

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