jquery uses JSON to implement regional linkage effect code

jquery uses JSON to implement regional linkage effect code

But see the inside JSON type format design is very good, generally we do not do any processing in the background JSON data format similar to the following
[{' Code ': 3231, ' Name ': ' Changchun '},
{' Code ': 3232, ' Name ': ' Jilin}]
If there are 10,000 regions, there will be tens of thousands of more characters, so extravagant practice I think I'll just give up.

The area table is generally designed to
AT_ID: Uniquely identifies the corresponding code within the JSON
At_name: Local Chinese name
At_parentid: Parent ID
At_level: Level, 1 for provincial, 2 for city level

var area = ' {city3145 ': "Municipal District",
"code3145": "3179",
"city3146": "Municipal District",
"code3146": "3180",
"city3147": "Shijiazhuang City, Tangshan, Qinhuangdao Shi, Hanhan, Xingtai, Baoding, Zhangjiakou, Chengde, Cangzhou, Langfang, Hengshui",
"code3147": "3181,3182,3183,3184,3185,3186,3187,3188,3189,3190,3191",
"city3148": "Taiyuan City, Datong, Yangquan, Changzhi, Jincheng, Shuozhou, Jinzhong, Yun City, Xinzhou, Linfen, Luliang City",
"code3148": "3192,3193,3194,3195,3196,3197,3198,3199,3200,3201,3202",
"city3149": "Hohhot City, Baotou, Wuhai, Chifeng, Tongliao, Eerduosi, Holonbuyr, Bayan Nur city, Wulanchabu City, Hinggan League, Xilin, Alxa league",
"code3149": "3203,3204,3205,3206,3207,3208,3209,3210,3211,3212,3213,3214",
"city3150": "Shenyang, Dalian, Anshan, Fushun, Benxi, Dandong, Jinzhou, Yingkou, Fuxin, Liaoyang, Panjin, Tieling, Chaoyang, Huludao",
"code3150": "3215,3216,3217,3218,3219,3220,3221,3222,3223,3224,3225,3226,3227,3228",
"city3151": "Changchun, Jilin, Siping, Liaoyuan, Tonghua, Bss, Songyuan, White City, Yanbian Korean autonomous Prefecture",
"code3151": "3229,3230,3231,3232,3233,3234,3235,3236,3237",
"city3152": "Harbin City, Qiqihar, Jixi, Hegang, Shuangyashan, Daqing, Yichun, Jiamusi, Qitaihe Shi, Mudanjiang, Heihe, Suihua, daxinganling",
"code3152": "3238,3239,3240,3241,3242,3243,3244,3245,3246,3247,3248,3249,3250",
"city3153": "Municipal District", "code3153": "3251",
"city3154": "Nanjing, Wuxi, Xuzhou, Changzhou, Suzhou, Nantong, Lianyungang, Huaian, Yancheng, Yangzhou, Zhenjiang, Taizhou, Suqian",
"code3154": "3252,3253,3254,3255,3256,3257,3258,3259,3260,3261,3262,3263,3264",
"city3155": "Hangzhou city, Ningbo, Wenzhou, Jiaxing, Huzhou, Shaoxing, Jinhua, Quzhou, Zhoushan, Taizhou, Lishui",
"code3155": "3265,3266,3267,3268,3269,3270,3271,3272,3273,3274,3275",
"city3156": "Hefei, Wuhu, Bangbu, Huainan, Maanshan, Huaibei, Tongling, Anqing, Huangshan, Chuzhou, Fuyang, Suzhou, Chaohu, Liu'an, Bozhou, Chizhou, Xuancheng",
"code3156": "3276,3277,3278,3279,3280,3281,3282,3283,3284,3285,3286,3287,3288,3289,3290,3291,3292",
"city3157": "Fuzhou, Xiamen, Putian, Sanming, Quanzhou, Zhangzhou, Nanping, Longyan, Ningde",
"code3157": "3293,3294,3295,3296,3297,3298,3299,3300,3301",
"city3158": "Nanchang, Jingdezhen, Pingxiang, Jiujiang, Xinyu, Yingtan, Ganzhou, Jian, Yichun, Fuzhou, Shangrao",
"code3158": "3302,3303,3304,3305,3306,3307,3308,3309,3310,3311,3312",
"city3159": "Jinan, Qingdao, Zibo, Zaozhuang, Dongying, Yantai, Weifang, Jining, Taian, Weihai, Rizhao, Laiwu, Linyi, Dezhou, Liaocheng, Binzhou, Heze City",
"code3159": "3313,3314,3315,3316,3317,3318,3319,3320,3321,3322,3323,3324,3325,3326,3327,3328,3329",
"city3160": "Zhengzhou, Kaifeng, Luoyang, Pingdingshan, Anyang, Hebi, Xinxiang, Jiaozuo, Puyang, Xuchang, Leihe, Sanmenxia Shi, Nanyang, Shangqiu, Xinyang, Zhoukou, Zhumadian",
"code3160": "3330,3331,3332,3333,3334,3335,3336,3337,3338,3339,3340,3341,3342,3343,3344,3345,3346",
"city3161": "Wuhan City, Huangshi, Shiyan, Yichang, Xiangfan, Ezhou, Jingmen, Xiaogan, Jinzhou, Huanggang, Xianning, Suizhou, Enshi, provincial administrative units",
"code3161": "3347,3348,3349,3350,3351,3352,3353,3354,3355,3356,3357,3358,3359,3360",
"city3162": "Changsha, Zhuzhou, Xiangtan, Hengyang, Shaoyang, Yueyang, Changde, Zhangjiajie, Yiyang, Chenzhou, Yongzhou, Huaihua, Loudi, Xiangxi Tujia",
"code3162": "3361,3362,3363,3364,3365,3366,3367,3368,3369,3370,3371,3372,3373,3374",
"city3163": "Guangzhou, Shaoguan, Shenzhen, Zhuhai, Shantou, Foshan, Jiangmen, Zhanjiang, Maoming, Zhaoqing, Huizhou, Meizhou, Shanwei, Heyuan, Yangjiang, Qingyuan, Dongguan, Zhongshan, Chaozhou, Jieyang, Yunfu",
"code3163": " 3375,3376,3377,3378,3379,3380,3381,3382,3383,3384,3385,3386,3387,3388,3389,3390,3391,3392,3393,3394,3395 ",
"city3164": "Nanning, Liuzhou, Guilin, Wuzhou, Beihai, Fangchenggang, Qinzhou, Guigang, Yulin, Baise, Hezhou, Hechi, guest city, Chongzuo City",
"code3164": "3396,3397,3398,3399,3400,3401,3402,3403,3404,3405,3406,3407,3408,3409",
"city3165": "Haikou, Sanya, provincial-level administrative units",
"code3165": "3410,3411,3412",
"city3166": "Municipal District",
"code3166": "3413",
"city3167": "Cheng Du, Zigong, Panzhihua, Luzhou, Deyang, Mianyang, Guangyuan, Suining, Neijiang, Leshan, Nanchong, Meishan, Yibin, Guangan, Dazhou, Yaan, Bazhong, Ziyang, Aba, Tibetan and Qiang Autonomous Prefecture, Tibetan Autonomous Prefecture, Liangshan Yi Autonomous Prefecture ",
"code3167": " 3415,3416,3417,3418,3419,3420,3421,3422,3423,3424,3425,3426,3427,3428,3429,3430,3431,3432,3433,3434,3435 ",
"city3168": "Guiyang, Liupanshui, Zunyi, Anshun, Tongren Prefecture, southwest Guizhou Buyei and Miao Autonomous Region, Bijie Prefecture, Guizhou, southeast Miao and Dong Autonomous Prefecture, Qiannan Buyei and Miao Autonomous Prefecture",
"code3168": "3436,3437,3438,3439,3440,3441,3442,3443,3444",
"city3169": "Kunming, Qujing, Yuxi, Baoshan, Zhaotong, Lijiang, Simao, Lincang, Chuxiongzhou, Honghe, Wenshan, Xishuangbanna Dai Autonomous Prefecture, Bai zu, Dehong dai Jingpo Autonomous Prefecture, Nujiang Autonomous Prefecture , the Dêqên Tibetan Autonomous Prefecture, "
"code3169": "3445,3446,3447,3448,3449,3450,3451,3452,3453,3454,3455,3456,3457,3458,3459,3460",
"city3170": "Lasa, Changdu, Shannan, Xigazê, Nagchu, Ali Prefecture, Linzhi",
"code3170": "3461,3462,3463,3464,3465,3466,3467",
"city3171": "Xi ' an city, Tongchuan, Baoji, Xianyang, Weinan, Yanan, Hanzhong, Yulin, Ankang, Shangluo",
"code3171": "3468,3469,3470,3471,3472,3473,3474,3475,3476,3477",
"city3172": "Lanzhou City, Jiayuguan, Jinchang, Baiyin, Tianshui, Wuwei, Zhangye, Pingliang, Jiuquan, Qingyang City, Dingxi City, Longnan, Linxia Hui Autonomous Prefecture, Gannan Tibetan Autonomous Prefecture",
"code3172": "3478,3479,3480,3481,3482,3483,3484,3485,3486,3487,3488,3489,3490,3491",
"city3173": "Xining City, Haidong Prefecture, Haibei Tibetan Autonomous Prefecture, Huangnan Tibetan Autonomous Prefecture, Hainan Tibetan Autonomous Prefecture, golog Tibetan Autonomous Prefecture, Yushu Tibetan Autonomous Prefecture, sea Simon Haixi Tibetan Autonomous Prefecture",
"code3173": "3492,3493,3494,3495,3496,3497,3498,3499",
"city3174": "Yinchuan, Shizuishan, Wuzhong, Guyuan, Zhongwei City",
"code3174": "3500,3501,3502,3503,3504",
"city3175": "Urumqi, Karamay, Turpan, Hami, Changji Hui Autonomous Prefecture, Bortala Mongol Autonomous Prefecture, Bainguo, Aksu, Kizilsu Kirgiz Zizhizhou, Kashgar, Hotan, Isahasak, Tacheng Prefecture, Altay Prefecture , the Provincial administrative Unit ",
"code3175": "3505,3506,3507,3508,3509,3510,3511,3512,3513,3514,3515,3516,3517,3518,3519",
"city3176": "",
"code3176": "",
"city3177": "",
"code3177": "",
"city3178": "",
"code3178": "",
Provinces: "Beijing, Tianjin City, Hebei Province, Shanxi province, Inner Mongolia Autonomous Region, Liaoning Province, Jilin Province, Heilongjiang Province, Shanghai city, Jiangsu Province, Zhejiang Province, Anhui Province, Fujian Province, Jiangxi Province, Shandong Province, Henan Province, Hubei province, Hunan province, Guangdong province, Guangxi Zhuang Autonomous Region, Hainan Province, Chongqing, Sichuan Province , Guizhou Province, Yunnan province, Tibet Autonomous Region, Shaanxi Province, Gansu province, Qinghai province, Ningxia Hui Autonomous Region, Xinjiang Uygur Autonomous Region, Taiwan Province, Hong Kong Special Administrative Region, Macao Special Administrative Region,
Provcodes: " 3145,3146,3147,3148,3149,3150,3151,3152,3153,3154,3155,3156,3157,3158,3159,3160,3161,3162,3163,3164,3165,3166,3167,3168,3 169,3170,3171,3172,3173,3174,3175,3176,3177,3178 "}";