Dieses Beispiel teilt den spezifischen Code für JS mit, um das Dropdown-Menü Sekundärverknüpfung für Ihre Referenz zu implementieren. Der spezifische Inhalt ist wie folgt
JS -Code -Teil:
/** nationale Stadtverknüpfung JS-Version der zweiten Ebene. return true;} Funktionsänderung (v) {var str = "0"; für (i = 0; i <v; i ++) {str+= ("_"+(document.getElementById (s [i]). SelectedIndex-1)); }; var ss = document.getElementById (s [v]); mit (ss) {Länge = 0; Optionen [0] = neue Option (opt0 [v], opt0 [v]); if (v && document.getElementById (s [v-1]). selectedIndex> 0 ||! für (i = 0; i <ar.Length; i ++) {Optionen [Länge] = neue Option (ar [i], ar [i]); } // end für if (v) {options [0] .Selected = true; }}} // End if v if (++ v <sength) {change (v);}} // End mit} var dSy = new DSy (); Mongolia","Liaoning","Jilin","Heilongjiang","Jiangsu","Zhejiang","Anhui","Fujian","Jiangxi","Shandong","Heinan","Hubei","Hunan","Guangdong","G uangxi","Hainan","Sichuan","Guizhou","Yunnan","Yunnan","Yunnan","Yunnan","Yunnan","Tibet","Shaanxi","Gansu","Qinghai","Ningxia","Xinxia","Hong Kong "," Macao "," Taiwan Provinz "]; Bezirk "," Shunyi District "," Changping District "," Daxing District "," Huairou District "," Pinggu District "," Miyun County "," Yanqing County "," Yanqing Town "]); dsy.add("0_1",["Heping District", "Hedong District", "Hexi District", "Nankai District", "Hebei District", "Hongqiao District", "Tanggu District", "Hangu District", "Dagang District", "Dongli District", "Xiqing District", "Jinnan District", "Beichen District", "Wuqing District", "Baodie Bezirk "," Ji County "," Ninghe County "," Lutai Town "," Jinghai County "," Jinghai Town "); Distrikt "," Yangpu District "," Minhang Bezirk "," Baoding District "," Baoding District "," Baoding District "," Jinshan District "," Songjiang District "," Qingpu District "," Nanhui District "," Fengxian District "," Chongy County "," Chengqiao ". District","Dadoukou District","Jiangbei District","Shapingba District","Jiulongpo District","Nan's District","Nan's District","Shapingba District","Jiulongpo District","Nan's District","Nan's District","Nan's District","Fuling District","Qianjiang District" ,"Changshou District","Hechuan City","Yongchuan City","Jijin City","Nanchuan City","Qijiang County","Tongnan County","Tongliang County","Dazu County","Rongchang County","Bishan County","Dianjiang County","Wulong County","Fengdu County","Chengkou County","Liangping County","Kai County "," Wuxi County "," Wushan County "," Fengjie County "," Yunyang County "," Zhong County "," Shizhu Tujia Autonomous County "," Pengshui Miao Miao Tujia Autonomous County "," Yoyang Tujia Miao Autonomous County "Xiushan Tujan Tujia mio mio miao -autonomous County" Xiushan Tujan Tujia mio mio miao miaoous County "xiushan tujan tujia mio mio mio miao County"]);dsy.add("0_4",["Shijiazhuang City","Zhangjiakou City","Chengde City","Qinhuangdao City","Tangshan City","Langfang City","Baoding City" ,"Hengshui City","Cangzhou City","Xingtai City","Handan City"]);dsy.add("0_5",["Taiyuan City","Shuozhou City","Datong City","Yangquan City","Changzhi City","Jin City","Xinzhou City","Jinzhong City","Linfen City","Luliang City","Yun City"]);dsy.add("0_6",["Hohhot City","Baotou City","Wuhai City","Chifeng City","Tongliao City","Hurundai City","Ordos City","Ulanqab City","Bayannur City","Xing'an League","Xilingol League","Alxa League"]);dsy.add("0_7",["Shenyang City","Chaoyang City","Fuxin City ","Teling City","Fushun City","Benxi City","Liaoyang City","Anshan City","Dandong City","Dalian City","Yingkou City","Panjin City","Jinzhou City","Huludao City "]); dsy.add (" 0_8 ", [" Changchun City "," Baicheng City "," Songyuan City "," Jilin City "," Schluckstadt "," Liaoyuan City "," Tonghua City "," Baishan City "," Yanbian Prefecture "); Stadt "," Qitaihe City "," Heihe City "," Daqing City "," Hegang City "," Yichun City "," Jiamusi City "," Shuangyashan City "," Jixi City "," Mudanjiang City "," Suihua City "," Daxinganling Area Area "," Daxinganling Area Area "," Daxinganling Area Area "]); dsy.add (" 0_10 ", [" Nanjing "," Xuzhou "," Lianyungang "," Suqian "," Hui'an "," Yanzhou "," Yangzhou "," Taizhou "," Nantong "," Zhenjiang "," Changzhou "," Wuxi "," Suzhou "]); dsy.add (" 0_11 ", [" Hangzhou "," Huzhou "," Jiaxing "," Zhoushan "," Ningbo "," Shaoxing "," Quzhou "," Jinhua "," Taizhou "," Wenzhou ", "Lishui"]); "Chuzhou City", "Ma'anshan City", "Wuhu City", "Tongling City", "Anqing City", "Huangshan City", "Lu'an City", "Chaohu City", "Chizhou City", "Xuan City"); "Sanming City", "Quanzhou City", "Xiamen City", "Zhangzhou City", "Longyan City", "Ningde City"); "Ganzhou City", "Shangrao City", "Fuzhou City", "Yichun City", "Jian City"); "Weihai City", "Rizhao City", "Linyi City", "Zaozhuang City", "Jining City", "Tai'an City", "Laiwu City", "Binzhou City", "Heze City"); City", "Jiazuo City", "Xinxiang City", "Hebi City", "Anyang City", "Puyang City", "Shangqiu City", "Xuchang City", "Luohe City", "Pingdingshan City", "Nanyang City", "Xinyang City", "Xinyang City", "Zhoukou City", "Zhumadian City", "Jiyuan City"]); "Suizhou City", "Verwaltungseinheit auf provinziell Ebene", "Enshi Präfektur"); "Yongzhou City", "Shaoyang City", "Huaihua City", "Loudi City", "Xiangxi Präfektur"); City", "Shantou City", "Jieyang City", "Shanwei City", "Huizhou City", "Dongguan City", "Zhuhai City", "Zhongshan City", "Jiangmen City", "Foshan City", "Zhaoqing City", "Yunfu City", "Yangjiang City", "Maoming City", "Zhanjiang City"]);dsy.add("0_20",["Nanning City", "Guilin City", "Liuzhou City", "Wuzhou City", "Guigang City", "Yulin City", "Yulin City", "Qinzhou City", "Beihai City", "Fangchenggang City", "Chongzuo City", "Baise City", "Hechi Stadt "," Laibin City "," Hiszhou City "]); add("0_22",["Chengdu City","Guangyuan City","Mianyang City","Deyang City","Nanchong City","Guang'an City","Suining City","Neijiang City","Leshan City","Zigong City","Luzhou City","Yibin City","Panzhihua City","Bazhong City","Dazhou City","Ziyang City","Meishan City","Ya'an City","Aba City","Ganzi City","Liu Panshui City","Zunyi City","Anshun City","Bijie District","Tongren District","Qiandongnan Prefecture","Qianxi Prefecture","Qianxi Prefecture"]);dsy.add("0_24",["Kunming City","Qujing city","Yuxi city","Baoshan city","Zhaotong city","Lijiang city","Simao city","Lincang city","Dehong city","Nujiang city","Diqing city","Dali city","Daiqing Stadt "," Chuxiong City "," Honghe City "," Wenshan City "," Xishuangbanna City "]; Bereich "]); dsy.add (" 0_26 ", [" Xi'an City "," Yan'an City "," Tongchuan City "," Weinan City "," Xianyang City "," Baoji City "," Hanzhong City "," Yulin City ", Ankang City", "Shangluo City"; . Stadt "]); dsy.add (" 0_28 ", [" Xining City "," Haidong District "," Haibei Präfektur "," Hainan Präfektur "," Huangnan Präfektur "," Goluo Präfektur "," yushu Präfektur ", Haixi Präfektur"); Stadt "," Shizuishan City "," Wuzhong City "," Guyuan City "Zhongwei City"); "Präfektur" Kizilsuke "," Präfektur Bortala "," Changji Präfektur "," Bainguoleng -Präfektur "," Ili Präfektur "," Tacheng Präfektur "," Altay Region "]); Region "]; "Yunlin", "Changhua"]; "Fujian", "Jiangxi", "Shandong", "Heinan", "Hubei", "Hunan", "Guangdong", "Guangxi", "Hainan", "Sichuan", "Guizhou", "Yunnan", "Yunnan", "Tibet", "Shaanxi", "Gansu", "Qinghai", "Ningxia", "Xinjiang", "Hongkong", "Macao", "Taiwan Provinz"]; var für (i = 0; i <sength-1; i ++) {document.getElementById (s [i]). onchange = new function ("ändern ("+(i+1)+")"); } ändern (0);}HTML -Code -Teil:
<Head> <meta http-äquiv = "content-type" content = "text/html; charset = utf-8"/> <title> Nationale Verknüpfung der zweiten Ebene </title> <style type = "text/cs"> body {Hintergrund: #eeeeee; Margin: 0; Polsterung: 0; Schriftfamilie: "Microsoft Yahei", Arial, Helvetica, Sans-Serif; } a {color:#006600; Textdekoration: Keine;} A: Hover {Farbe:#990000;}. Top {Margin: 5px Auto; Farbe:#990000; Text-Align: Center;}. Info Select {Border: 1PX #993300 Solid; Hintergrund: #fffff;}. Info {Margin: 5px; text-align: center;}. info #show {color: #3399ff; } .bottom {Text-Align: Right; Schriftgröße: 12px; Farbe: #cccc; Breite: 1000px;} </style> </head> <body> <div> <h1> Nationale Verknüpfung der zweiten Ebene. type = "text/javaScript"> </script> <script type = "text/javascript"> _ init_area (); </script> </div> </div> </body> </html>Das Obige dreht sich alles um diesen Artikel, ich hoffe, es wird für das Lernen aller hilfreich sein.