Para realizar la vinculación de la lista desplegable, quiero usar dos listas desplegables para realizar la selección de direcciones.

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var x =[35];

x[0]= " "; p>

X[1]="Beijing, Dongcheng, Xicheng, Chongwen, Xuanwu, Chaoyang, Fengtai, Shijingshan, Haidian, Mentougou, Fangshan, Tongzhou, Shunyi, Changping, Daxing, Pinggu, Huairou, Miyun, Yanqing ";

, Fengxian, Chongming";

X[3]="Tianjin, Heping, Dongli, Hedong, Xiqing, Hexi, Jinnan, Nankai, Beichen, Hebei, Wuqing, Honggu, Tanggu, Hangu, Dagang, Ninghe, Jinghai, Baodi, Jixian, Daqiuzhuang";

X[4]="Chongqing, Wanzhou, Fuling, Yuzhong, Dadukou, Jiangbei, Shapingba, Jiulongpo, Nan'an, Beibei, Wansheng, Shuangge, Yubei, Banan, Qianjiang, Changshou, Qijiang, Tongnan, Tongliang, Dazu, Rongchang, Bishan, Liangping.

X[5]="Shijiazhuang, Handan, Xingtai, Baoding, Zhangjiakou, Chengde, Langfang, Tangshan, Qinhuangdao, Cangzhou, Hengshui";

X[6]="Taiyuan , Datong, Yangquan, Changzhi, Jincheng, Shuozhou, Luliang, Xinzhou, Jinzhong, Linfen, Yuncheng";

X[7]="Hohhot, Baotou, Wuhai, Chifeng, Liga Hulunbuir, Liga Ala Shan, Liga Zhelim, Liga Xing'an, Liga Ulanqab, Liga Xilingol, Liga Bayannur, Liga Yikezhao";

X[8]="Shenyang, Dalian, Anshan, Fushun, Benxi, Dandong, Jinzhou, Yingkou, Fuxin, Liaoyang, Panjin, Tieling, Chaoyang, Huludao";

X[9]="Changchun, Jilin, Siping, Liaoyuan, Tonghua, Baishan, Songyuan, Baicheng, Yanbian";

X[10]="Harbin, Qiqihar, Mudanjiang, Jiamusi, Daqing, Suihua, Hegang, Jixi, Heihe, Shuangyashan, Yichun, Qitaihe, Daxinganling";

X[11]="Nanjing, Zhenjiang, Suzhou, Nantong, Yangzhou, Yancheng, Xuzhou, Lianyungang, Changzhou, Wuxi, Suqian, Taizhou, Huaian";

X[12] ="Hangzhou, Ningbo, Wenzhou, Jiaxing, Huzhou, Shaoxing, Jinhua, Quzhou, Zhoushan, Taizhou, Lishui";

X[13]="Hefei, Wuhu, Bengbu, Ma'anshan, Huaibei, Tongling, Anqing, Huangshan, Chuzhou, Suzhou, Chizhou, Huainan, Chaohu, Fuyang, Lu'an, Xuancheng, Bozhou";

X[14]="Fuzhou, Xiamen, Putian, Sanming, Quanzhou, Zhangzhou, Nanping, Longyan, Ningde";

X[15]="Nanchang, Jingdezhen, Jiujiang, Yingtan, Pingxiang, Xinyu, Ganzhou, Ji'an, Yichun, Fuzhou, Shangrao";

X[16]="Jinan, Qingdao, Zibo, Zaozhuang, Dongying, Yantai, Weifang, Jining, Tai'an, Weihai, Rizhao, Laiwu, Linyi, Dezhou, Liaocheng, Binzhou, Heze, Boxing";

X[17]="Zhengzhou, Kaifeng, Luoyang, Pingdingshan, Anyang, Hebi, Xinxiang, Jiaozuo, Puyang, Xuchang, Luohe, Sanmenxia, ​​Nanyang, Shangqiu, Xinyang, Zhoukou, Zhumadian, Jiyuan";

X[18]=" Wuhan, Yichang, Jingzhou, Xiangfan, Huangshi, Jingmen, Huanggang, Shiyan, Enshi, Qianjiang, Tianmen, Xiantao, Suizhou, Xianning, Xiaogan, Ezhou";

X[ 19]="Changsha, Changde, Zhuzhou, Xiangtan, Hengyang, Yueyang, Shaoyang, Yiyang, Loudi, Huaihua, Chenzhou, Yongzhou, Xiangxi, Zhangjiajie";

X[20]="Guangzhou, Shenzhen, Zhuhai, Shantou, Dongguan, Zhongshan, Foshan, Shaoguan, Jiangmen, Zhanjiang, Maoming, Zhaoqing, Huizhou, Meizhou, Shanwei, Heyuan, Yangjiang, Qingyuan, Chaozhou, Jieyang, Yunfu";

X[21] ="Nanning, Liuzhou, Guilin, Wuzhou, Beihai, Fangchenggang, Qinzhou, Guigang, Yulin, Nanning, Liuzhou, Hezhou, Baise, Hechi";

X[22]="Haikou, Sanya";

X[ 23]="Chengdu, Mianyang, Deyang, Zigong, Panzhihua, Guangyuan, Neijiang, Leshan, Nanchong, Yibin, Guang'an, Dachuan, Ya'an, Meishan, Garze, Liangshan, Luzhou";

X[24]="Guiyang, Liupanshui, Zunyi, Anshun, Tongren, Qiandongnan, Bijie, Qiandongnan, Qiannan";

Qujing, Yuxi, Zhaotong, Chuxiong, Honghe, Wenshan, Simao, Xishuangbanna, Baoshan, Dehong, Lijiang, Nujiang, Diqing, Lincang";

X[26]="Lhasa, Shigatse, Shannan, Linzhi, Qamdo, Ali, Naqu";

x[ 27]="Xi'an, Baoji, Xianyang, Tongchuan, Weinan, Yan'an, Yulin, Hanzhong, Ankang, Shangluo";

X[28]="Lanzhou, Jiayuguan, Jinchang, Baiyin, Tianshui, Jiuquan, Zhangye, Wuwei, Dingxi, Longnan, Pingliang, Qingyang, Linxia, ​​​​Gannan";

X[29]= "Yinchuan, Shizuishan, Wuzhong, Guyuan";

X[30]="Xining, Haidong, Hainan, Haibei, Huangnan, Yushu, Guoluo, Haixi";