中国省市 Json 二级联动

var cities =  {‘北京‘: [‘北京‘], ‘广东‘: [‘广州‘, ‘深圳‘, ‘珠海‘, ‘汕头‘, ‘韶关‘, ‘佛山‘, ‘江门‘, ‘湛江‘, ‘茂名‘, ‘肇庆‘, ‘惠州‘, ‘梅州‘, ‘汕尾‘, ‘河源‘, ‘阳江‘, ‘清远‘, ‘东莞‘, ‘中山‘, ‘潮州‘, ‘揭阳‘, ‘云浮‘], ‘上海‘: [‘黄浦区‘, ‘卢湾区‘, ‘徐汇区‘, ‘长宁区‘, ‘静安区‘, ‘普陀区‘, ‘闸北区‘, ‘虹口区‘, ‘杨浦区‘, ‘宝山区‘, ‘闵行区‘, ‘嘉定区‘, ‘松江区‘, ‘金山区‘, ‘青浦区‘, ‘南汇区‘, ‘奉贤区‘, ‘浦东新区‘, ‘崇明县‘], ‘天津‘: [‘和平区‘, ‘河东区‘, ‘河西区‘, ‘南开区‘, ‘河北区‘, ‘红桥区‘, ‘塘沽区‘, ‘汉沽区‘, ‘大港区‘, ‘东丽区‘, ‘西青区‘, ‘北辰区‘, ‘津南区‘, ‘武清区‘, ‘宝坻区‘, ‘静海县‘, ‘宁河县‘, ‘蓟县‘], ‘重庆‘: [‘渝中区‘, ‘大渡口区‘, ‘江北区‘, ‘南岸区‘, ‘北碚区‘, ‘渝北区‘, ‘巴南区‘, ‘长寿区‘, ‘双桥区‘, ‘沙坪坝区‘, ‘万盛区‘, ‘万州区‘, ‘涪陵区‘, ‘黔江区‘, ‘永川区‘, ‘合川区‘, ‘江津区‘, ‘九龙坡区‘, ‘南川区‘, ‘綦江县‘, ‘潼南县‘, ‘荣昌县‘, ‘璧山县‘, ‘大足县‘, ‘铜梁县‘, ‘梁平县‘, ‘开县‘, ‘忠县‘, ‘城口县‘, ‘垫江县‘, ‘武隆县‘, ‘丰都县‘, ‘奉节县‘, ‘云阳县‘, ‘巫溪县‘, ‘巫山县‘, ‘石柱土家族自治县‘, ‘秀山土家族苗族自治县‘, ‘酉阳土家族苗族自治县‘, ‘彭水苗族土家族自治县‘], ‘辽宁‘: [‘沈阳‘, ‘大连‘, ‘鞍山‘, ‘抚顺‘, ‘本溪‘, ‘丹东‘, ‘锦州‘, ‘营口‘, ‘阜新‘, ‘辽阳‘, ‘盘锦‘, ‘铁岭‘, ‘朝阳‘, ‘葫芦岛‘], ‘江苏‘: [‘南京‘, ‘苏州‘, ‘无锡‘, ‘常州‘, ‘镇江‘, ‘南通‘, ‘泰州‘, ‘扬州‘, ‘盐城‘, ‘连云港‘, ‘徐州‘, ‘淮安‘, ‘宿迁‘], ‘湖北‘: [‘武汉‘, ‘黄石‘, ‘十堰‘, ‘荆州‘, ‘宜昌‘, ‘襄樊‘, ‘鄂州‘, ‘荆门‘, ‘孝感‘, ‘黄冈‘, ‘咸宁‘, ‘随州‘, ‘恩施土家族苗族自治州‘, ‘仙桃‘, ‘天门‘, ‘潜江‘, ‘神农架林区‘], ‘四川‘: [‘成都‘, ‘自贡‘, ‘攀枝花‘, ‘泸州‘, ‘德阳‘, ‘绵阳‘, ‘广元‘, ‘遂宁‘, ‘内江‘, ‘乐山‘, ‘南充‘, ‘眉山‘, ‘宜宾‘, ‘广安‘, ‘达州‘, ‘雅安‘, ‘巴中‘, ‘资阳‘, ‘阿坝藏族羌族自治州‘, ‘甘孜藏族自治州‘, ‘凉山彝族自治州‘], ‘陕西‘: [‘西安‘, ‘铜川‘, ‘宝鸡‘, ‘咸阳‘, ‘渭南‘, ‘延安‘, ‘汉中‘, ‘榆林‘, ‘安康‘, ‘商洛‘], ‘河北‘: [‘石家庄‘, ‘唐山‘, ‘秦皇岛‘, ‘邯郸‘, ‘邢台‘, ‘保定‘, ‘张家口‘, ‘承德‘, ‘沧州‘, ‘廊坊‘, ‘衡水‘], ‘山西‘: [‘太原‘, ‘大同‘, ‘阳泉‘, ‘长治‘, ‘晋城‘, ‘朔州‘, ‘晋中‘, ‘运城‘, ‘忻州‘, ‘临汾‘, ‘吕梁‘], ‘河南‘: [‘郑州‘, ‘开封‘, ‘洛阳‘, ‘平顶山‘, ‘安阳‘, ‘鹤壁‘, ‘新乡‘, ‘焦作‘, ‘濮阳‘, ‘许昌‘, ‘漯河‘, ‘三门峡‘, ‘南阳‘, ‘商丘‘, ‘信阳‘, ‘周口‘, ‘驻马店‘, ‘焦作‘], ‘吉林‘: [‘长春‘, ‘吉林‘, ‘四平‘, ‘辽源‘, ‘通化‘, ‘白山‘, ‘松原‘, ‘白城‘, ‘延边朝鲜族自治州‘], ‘黑龙江‘: [‘哈尔滨‘, ‘齐齐哈尔‘, ‘鹤岗‘, ‘双鸭山‘, ‘鸡西‘, ‘大庆‘, ‘伊春‘, ‘牡丹江‘, ‘佳木斯‘, ‘七台河‘, ‘黑河‘, ‘绥化‘, ‘大兴安岭地区‘], ‘内蒙古‘: [‘呼和浩特‘, ‘包头‘, ‘乌海‘, ‘赤峰‘, ‘通辽‘, ‘鄂尔多斯‘, ‘呼伦贝尔‘, ‘巴彦淖尔‘, ‘乌兰察布‘, ‘锡林郭勒盟‘, ‘兴安盟‘, ‘阿拉善盟‘], ‘山东‘: [‘济南‘, ‘青岛‘, ‘淄博‘, ‘枣庄‘, ‘东营‘, ‘烟台‘, ‘潍坊‘, ‘济宁‘, ‘泰安‘, ‘威海‘, ‘日照‘, ‘莱芜‘, ‘临沂‘, ‘德州‘, ‘聊城‘, ‘滨州‘, ‘菏泽‘], ‘安徽‘: [‘合肥‘, ‘芜湖‘, ‘蚌埠‘, ‘淮南‘, ‘马鞍山‘, ‘淮北‘, ‘铜陵‘, ‘安庆‘, ‘黄山‘, ‘滁州‘, ‘阜阳‘, ‘宿州‘, ‘巢湖‘, ‘六安‘, ‘亳州‘, ‘池州‘, ‘宣城‘], ‘浙江‘: [‘杭州‘, ‘宁波‘, ‘温州‘, ‘嘉兴‘, ‘湖州‘, ‘绍兴‘, ‘金华‘, ‘衢州‘, ‘舟山‘, ‘台州‘, ‘丽水‘], ‘福建‘: [‘福州‘, ‘厦门‘, ‘莆田‘, ‘三明‘, ‘泉州‘, ‘漳州‘, ‘南平‘, ‘龙岩‘, ‘宁德‘], ‘湖南‘: [‘长沙‘, ‘株洲‘, ‘湘潭‘, ‘衡阳‘, ‘邵阳‘, ‘岳阳‘, ‘常德‘, ‘张家界‘, ‘益阳‘, ‘郴州‘, ‘永州‘, ‘怀化‘, ‘娄底‘, ‘湘西土家族苗族自治州‘], ‘广西‘: [‘南宁‘, ‘柳州‘, ‘桂林‘, ‘梧州‘, ‘北海‘, ‘防城港‘, ‘钦州‘, ‘贵港‘, ‘玉林‘, ‘百色‘, ‘贺州‘, ‘河池‘, ‘来宾‘, ‘崇左‘], ‘江西‘: [‘南昌‘, ‘景德镇‘, ‘萍乡‘, ‘九江‘, ‘新余‘, ‘鹰潭‘, ‘赣州‘, ‘吉安‘, ‘宜春‘, ‘抚州‘, ‘上饶‘], ‘贵州‘: [‘贵阳‘, ‘六盘水‘, ‘遵义‘, ‘安顺‘, ‘铜仁地区‘, ‘毕节地区‘, ‘黔西南布依族苗族自治州‘, ‘黔东南苗族侗族自治州‘, ‘黔南布依族苗族自治州‘], ‘云南‘: [‘昆明‘, ‘曲靖‘, ‘玉溪‘, ‘保山‘, ‘昭通‘, ‘丽江‘, ‘普洱‘, ‘临沧‘, ‘德宏傣族景颇族自治州‘, ‘怒江傈僳族自治州‘, ‘迪庆藏族自治州‘, ‘大理白族自治州‘, ‘楚雄彝族自治州‘, ‘红河哈尼族彝族自治州‘, ‘文山壮族苗族自治州‘, ‘西双版纳傣族自治州‘], ‘西藏‘: [‘拉萨‘, ‘那曲地区‘, ‘昌都地区‘, ‘林芝地区‘, ‘山南地区‘, ‘日喀则地区‘, ‘阿里地区‘], ‘海南‘: [‘海口‘, ‘三亚‘, ‘五指山‘, ‘琼海‘, ‘儋州‘, ‘文昌‘, ‘万宁‘, ‘东方‘, ‘澄迈县‘, ‘定安县‘, ‘屯昌县‘, ‘临高县‘, ‘白沙黎族自治县‘, ‘昌江黎族自治县‘, ‘乐东黎族自治县‘, ‘陵水黎族自治县‘, ‘保亭黎族苗族自治县‘, ‘琼中黎族苗族自治县‘], ‘甘肃‘: [‘兰州‘, ‘嘉峪关‘, ‘金昌‘, ‘白银‘, ‘天水‘, ‘武威‘, ‘酒泉‘, ‘张掖‘, ‘庆阳‘, ‘平凉‘, ‘定西‘, ‘陇南‘, ‘临夏回族自治州‘, ‘甘南藏族自治州‘], ‘宁夏‘: [‘银川‘, ‘石嘴山‘, ‘吴忠‘, ‘固原‘, ‘中卫‘], ‘青海‘: [‘西宁‘, ‘海东地区‘, ‘海北藏族自治州‘, ‘海南藏族自治州‘, ‘黄南藏族自治州‘, ‘果洛藏族自治州‘, ‘玉树藏族自治州‘, ‘海西蒙古族藏族自治州‘], ‘新疆‘: [‘乌鲁木齐‘, ‘克拉玛依‘, ‘吐鲁番地区‘, ‘哈密地区‘, ‘和田地区‘, ‘阿克苏地区‘, ‘喀什地区‘, ‘克孜勒苏柯尔克孜自治州‘, ‘巴音郭楞蒙古自治州‘, ‘昌吉回族自治州‘, ‘博尔塔拉蒙古自治州‘, ‘石河子‘, ‘阿拉尔‘, ‘图木舒克‘, ‘五家渠‘, ‘伊犁哈萨克自治州‘], ‘香港‘: [‘中西区‘, ‘湾仔区‘, ‘东区‘, ‘南区‘, ‘深水埗区‘, ‘油尖旺区‘, ‘九龙城区‘, ‘黄大仙区‘, ‘观塘区‘, ‘北区‘, ‘大埔区‘, ‘沙田区‘, ‘西贡区‘, ‘元朗区‘, ‘屯门区‘, ‘荃湾区‘, ‘葵青区‘, ‘离岛区‘], ‘澳门‘: [‘花地玛堂区‘, ‘圣安多尼堂区‘, ‘大堂区‘, ‘望德堂区‘, ‘风顺堂区‘, ‘嘉模堂区‘, ‘圣方济各堂区‘, ‘路凼‘], ‘台湾‘: [‘台北市‘, ‘高雄市‘, ‘台北县‘, ‘桃园县‘, ‘新竹县‘, ‘苗栗县‘, ‘台中县‘, ‘彰化县‘, ‘南投县‘, ‘云林县‘, ‘嘉义县‘, ‘台南县‘, ‘高雄县‘, ‘屏东县‘, ‘宜兰县‘, ‘花莲县‘, ‘台东县‘, ‘澎湖县‘, ‘基隆市‘, ‘新竹市‘, ‘台中市‘, ‘嘉义市‘, ‘台南市‘] }

<select style="width: auto"></select>
<select name="City" style="width: auto"></select>

        //根据城市获取省份
        function getState(city) {
            for (var i in cities) {
                var c = cities[i];
                for (var j in c) {
                    if (c[j] == city) {
                        return i;
                    }
                }
            }
        }
        //设置省份和城市下拉框的值
        function setStateAndCity(city2) {
            if (city2) {
                if (city2 == "北京" || city2 == "天津" || city2 == "上海" || city2 == "重庆") {
                    state.val(city2);
                    state.change();
                }
                else {
                    state.val(getState(city2));
                    state.change();
                    city.val(city2);
                }
            } else {
                state.change();
            }
        }

       var city = $(‘select[name="City"]‘), state = city.prev(); 
        //加载省份下拉框选项
        for (var i in cities) {
            state.append(‘<option>‘ + i + ‘</option>‘);
        }
       //根据省份下拉框值，加载相应的城市下拉框选项，并定位地图中心点
        state.change(function () {
            var s = cities[this.value];
            city.html(‘‘);
            for (var i in s) {
                city.append(‘<option>‘ + s[i] + ‘</option>‘);
            }
        });

        state.change();