Javascript特效之實現省市級聯動
我們在網上買東西經常會需要填地址，而在填地址的時候經常在輸入省份時就會自動彈出對應省份下面的市，今天我們來看看怎麼簡單的通過js實現省市聯動。
效果圖：
在選擇省份後，後面的下拉框會自動賦值爲該省份下面的城市。
實現思路：
首先我們要預設置好每個省份下面有多少個城市，然後在根據省份對應的城市查詢出來賦值給後面城市的下拉框。
js代碼：
var where = new Array(35);
function comefrom(loca,locacity) { this.loca = loca; this.locacity = locacity; }
where[0]= new comefrom("請選擇省份名","請選擇城市名");
where[1] = new comefrom("北京","|東城|西城|崇文|宣武|朝陽|豐臺|石景山|海淀|門頭溝|房山|通州|順義|昌平|大興|平谷|懷柔|密雲|延慶");
where[2] = new comefrom("上海","|黃浦|盧灣|徐匯|長寧|靜安|普陀|閘北|虹口|楊浦|閔行|寶山|嘉定|浦東|金山|松江|青浦|南匯|奉賢|崇明");
where[3] = new comefrom("天津","|和平|東麗|河東|西青|河西|津南|南開|北辰|河北|武清|紅撟|塘沽|漢沽|大港|寧河|靜海|寶坻|薊縣");
where[4] = new comefrom("重慶","|萬州|涪陵|渝中|大渡口|江北|沙坪壩|九龍坡|南岸|北碚|萬盛|雙撟|渝北|巴南|黔江|長壽|綦江|潼南|銅梁|大足|榮昌|壁山|梁平|城口|豐都|墊江|武隆|忠縣|開縣|雲陽|奉節|巫山|巫溪|石柱|秀山|酉陽|彭水|江津|合川|永川|南川");
where[5] = new comefrom("河北","|石家莊|邯鄲|邢臺|保定|張家口|承德|廊坊|唐山|秦皇島|滄州|衡水");
where[6] = new comefrom("山西","|太原|大同|陽泉|長治|晉城|朔州|呂梁|忻州|晉中|臨汾|運城");
where[7] = new comefrom("內蒙古","|呼和浩特|包頭|烏海|赤峯|呼倫貝爾盟|阿拉善盟|哲裏木盟|興安盟|烏蘭察布盟|錫林郭勒盟|巴彥淖爾盟|伊克昭盟");
where[8] = new comefrom("遼寧","|瀋陽|大連|鞍山|撫順|本溪|丹東|錦州|營口|阜新|遼陽|盤錦|鐵嶺|朝陽|葫蘆島");
where[9] = new comefrom("吉林","|長春|吉林|四平|遼源|通化|白山|松原|白城|延邊");
where[10] = new comefrom("黑龍江","|哈爾濱|齊齊哈爾|牡丹江|佳木斯|大慶|綏化|鶴崗|雞西|黑河|雙鴨山|伊春|七臺河|大興安嶺");
where[11] = new comefrom("江蘇","|南京|鎮江|蘇州|南通|揚州|鹽城|徐州|連雲港|常州|無錫|宿遷|泰州|淮安");
where[12] = new comefrom("浙江","|杭州|寧波|溫州|嘉興|湖州|紹興|金華|衢州|舟山|台州|麗水");
where[13] = new comefrom("安徽","|合肥|蕪湖|蚌埠|馬鞍山|淮北|銅陵|安慶|黃山|滁州|宿州|池州|淮南|巢湖|阜陽|六安|宣城|亳州");
where[14] = new comefrom("福建","|福州|廈門|莆田|三明|泉州|漳州|南平|龍巖|寧德");
where[15] = new comefrom("江西","|南昌市|景德鎮|九江|鷹潭|萍鄉|新餘|贛州|吉安|宜春|撫州|上饒");
where[16] = new comefrom("山東","|濟南|青島|淄博|棗莊|東營|煙臺|濰坊|濟寧|泰安|威海|日照|萊蕪|臨沂|德州|聊城|濱州|菏澤");
where[17] = new comefrom("河南","|鄭州|開封|洛陽|平頂山|安陽|鶴壁|新鄉|焦作|濮陽|許昌|漯河|三門峽|南陽|商丘|信陽|周口|駐馬店|濟源");
where[18] = new comefrom("湖北","|武漢|宜昌|荊州|襄樊|黃石|荊門|黃岡|十堰|恩施|潛江|天門|仙桃|隨州|咸寧|孝感|鄂州");
where[19] = new comefrom("湖南","|長沙|常德|株洲|湘潭|衡陽|岳陽|邵陽|益陽|婁底|懷化|郴州|永州|湘西|張家界");
where[20] = new comefrom("廣東","|廣州|深圳|珠海|汕頭|東莞|中山|佛山|韶關|江門|湛江|茂名|肇慶|惠州|梅州|汕尾|河源|陽江|清遠|潮州|揭陽|雲浮");
where[21] = new comefrom("廣西","|南寧|柳州|桂林|梧州|北海|防城港|欽州|貴港|玉林|南寧地區|柳州地區|賀州|百色|河池");
where[22] = new comefrom("海南","|海口|三亞");
where[23] = new comefrom("四川","|成都|綿陽|德陽|自貢|攀枝花|廣元|內江|樂山|南充|宜賓|廣安|達川|雅安|眉山|甘孜|涼山|瀘州");
where[24] = new comefrom("貴州","|貴陽|六盤水|遵義|安順|銅仁|黔西南|畢節|黔東南|黔南");
where[25] = new comefrom("雲南","|昆明|大理|曲靖|玉溪|昭通|楚雄|紅河|文山|思茅|西雙版納|保山|德宏|麗江|怒江|迪慶|臨滄");
where[26] = new comefrom("西藏","|拉薩|日喀則|山南|林芝|昌都|阿里|那曲");
where[27] = new comefrom("陝西","|西安|寶雞|咸陽|銅川|渭南|延安|榆林|漢中|安康|商洛");
where[28] = new comefrom("甘肅","|蘭州|嘉峪關|金昌|白銀|天水|酒泉|張掖|武威|定西|隴南|平涼|慶陽|臨夏|甘南");
where[29] = new comefrom("寧夏","|銀川|石嘴山|吳忠|固原");
where[30] = new comefrom("青海","|西寧|海東|海南|海北|黃南|玉樹|果洛|海西");
where[31] = new comefrom("新疆","|烏魯木齊|石河子|克拉瑪依|伊犁|巴音郭勒|昌吉|克孜勒蘇柯爾克孜|博爾塔拉|吐魯番|哈密|喀什|和田|阿克蘇");
where[32] = new comefrom("香港","");
where[33] = new comefrom("澳門","");
where[34] = new comefrom("臺灣","|臺北|高雄|臺中|臺南|屏東|南投|雲林|新竹|彰化|苗栗|嘉義|花蓮|桃園|宜蘭|基隆|臺東|金門|馬祖|澎湖");
where[35] = new comefrom("其它","|北美洲|南美洲|亞洲|非洲|歐洲|大洋洲");
function select() {
with(document.creator.province) { var loca2 = options[selectedIndex].value; }
for(i = 0;i < where.length;i ++) {
if (where[i].loca == loca2) {
loca3 = (where[i].locacity).split("|");
for(j = 0;j < loca3.length;j++) { with(document.creator.city) { length = loca3.length; options[j].text = loca3[j]; options[j].value = loca3[j]; var loca4=options[selectedIndex].value;}}
break;
}}
document.creator.newlocation.value=loca2+loca4;
}
function init() {
with(document.creator.province) {
length = where.length;
for(k=0;k<where.length;k++) { options[k].text = where[k].loca; options[k].value = where[k].loca; }
options[selectedIndex].text = where[0].loca; options[selectedIndex].value = where[0].loca;
}
with(document.creator.city) {
loca3 = (where[0].locacity).split("|");
length = loca3.length;
for(l=0;l<length;l++) { options[l].text = loca3[l]; options[l].value = loca3[l]; }
options[selectedIndex].text = loca3[0]; options[selectedIndex].value = loca3[0];
}} var where = new Array(35);
function comefrom(loca,locacity) { this.loca = loca; this.locacity = locacity; }
where[0]= new comefrom("請選擇省份名","請選擇城市名");
where[1] = new comefrom("北京","|東城|西城|崇文|宣武|朝陽|豐臺|石景山|海淀|門頭溝|房山|通州|順義|昌平|大興|平谷|懷柔|密雲|延慶");
where[2] = new comefrom("上海","|黃浦|盧灣|徐匯|長寧|靜安|普陀|閘北|虹口|楊浦|閔行|寶山|嘉定|浦東|金山|松江|青浦|南匯|奉賢|崇明");
where[3] = new comefrom("天津","|和平|東麗|河東|西青|河西|津南|南開|北辰|河北|武清|紅撟|塘沽|漢沽|大港|寧河|靜海|寶坻|薊縣");
where[4] = new comefrom("重慶","|萬州|涪陵|渝中|大渡口|江北|沙坪壩|九龍坡|南岸|北碚|萬盛|雙撟|渝北|巴南|黔江|長壽|綦江|潼南|銅梁|大足|榮昌|壁山|梁平|城口|豐都|墊江|武隆|忠縣|開縣|雲陽|奉節|巫山|巫溪|石柱|秀山|酉陽|彭水|江津|合川|永川|南川");
where[5] = new comefrom("河北","|石家莊|邯鄲|邢臺|保定|張家口|承德|廊坊|唐山|秦皇島|滄州|衡水");
where[6] = new comefrom("山西","|太原|大同|陽泉|長治|晉城|朔州|呂梁|忻州|晉中|臨汾|運城");
where[7] = new comefrom("內蒙古","|呼和浩特|包頭|烏海|赤峯|呼倫貝爾盟|阿拉善盟|哲裏木盟|興安盟|烏蘭察布盟|錫林郭勒盟|巴彥淖爾盟|伊克昭盟");
where[8] = new comefrom("遼寧","|瀋陽|大連|鞍山|撫順|本溪|丹東|錦州|營口|阜新|遼陽|盤錦|鐵嶺|朝陽|葫蘆島");
where[9] = new comefrom("吉林","|長春|吉林|四平|遼源|通化|白山|松原|白城|延邊");
where[10] = new comefrom("黑龍江","|哈爾濱|齊齊哈爾|牡丹江|佳木斯|大慶|綏化|鶴崗|雞西|黑河|雙鴨山|伊春|七臺河|大興安嶺");
where[11] = new comefrom("江蘇","|南京|鎮江|蘇州|南通|揚州|鹽城|徐州|連雲港|常州|無錫|宿遷|泰州|淮安");
where[12] = new comefrom("浙江","|杭州|寧波|溫州|嘉興|湖州|紹興|金華|衢州|舟山|台州|麗水");
where[13] = new comefrom("安徽","|合肥|蕪湖|蚌埠|馬鞍山|淮北|銅陵|安慶|黃山|滁州|宿州|池州|淮南|巢湖|阜陽|六安|宣城|亳州");
where[14] = new comefrom("福建","|福州|廈門|莆田|三明|泉州|漳州|南平|龍巖|寧德");
where[15] = new comefrom("江西","|南昌市|景德鎮|九江|鷹潭|萍鄉|新餘|贛州|吉安|宜春|撫州|上饒");
where[16] = new comefrom("山東","|濟南|青島|淄博|棗莊|東營|煙臺|濰坊|濟寧|泰安|威海|日照|萊蕪|臨沂|德州|聊城|濱州|菏澤");
where[17] = new comefrom("河南","|鄭州|開封|洛陽|平頂山|安陽|鶴壁|新鄉|焦作|濮陽|許昌|漯河|三門峽|南陽|商丘|信陽|周口|駐馬店|濟源");
where[18] = new comefrom("湖北","|武漢|宜昌|荊州|襄樊|黃石|荊門|黃岡|十堰|恩施|潛江|天門|仙桃|隨州|咸寧|孝感|鄂州");
where[19] = new comefrom("湖南","|長沙|常德|株洲|湘潭|衡陽|岳陽|邵陽|益陽|婁底|懷化|郴州|永州|湘西|張家界");
where[20] = new comefrom("廣東","|廣州|深圳|珠海|汕頭|東莞|中山|佛山|韶關|江門|湛江|茂名|肇慶|惠州|梅州|汕尾|河源|陽江|清遠|潮州|揭陽|雲浮");
where[21] = new comefrom("廣西","|南寧|柳州|桂林|梧州|北海|防城港|欽州|貴港|玉林|南寧地區|柳州地區|賀州|百色|河池");
where[22] = new comefrom("海南","|海口|三亞");
where[23] = new comefrom("四川","|成都|綿陽|德陽|自貢|攀枝花|廣元|內江|樂山|南充|宜賓|廣安|達川|雅安|眉山|甘孜|涼山|瀘州");
where[24] = new comefrom("貴州","|貴陽|六盤水|遵義|安順|銅仁|黔西南|畢節|黔東南|黔南");
where[25] = new comefrom("雲南","|昆明|大理|曲靖|玉溪|昭通|楚雄|紅河|文山|思茅|西雙版納|保山|德宏|麗江|怒江|迪慶|臨滄");
where[26] = new comefrom("西藏","|拉薩|日喀則|山南|林芝|昌都|阿里|那曲");
where[27] = new comefrom("陝西","|西安|寶雞|咸陽|銅川|渭南|延安|榆林|漢中|安康|商洛");
where[28] = new comefrom("甘肅","|蘭州|嘉峪關|金昌|白銀|天水|酒泉|張掖|武威|定西|隴南|平涼|慶陽|臨夏|甘南");
where[29] = new comefrom("寧夏","|銀川|石嘴山|吳忠|固原");
where[30] = new comefrom("青海","|西寧|海東|海南|海北|黃南|玉樹|果洛|海西");
where[31] = new comefrom("新疆","|烏魯木齊|石河子|克拉瑪依|伊犁|巴音郭勒|昌吉|克孜勒蘇柯爾克孜|博爾塔拉|吐魯番|哈密|喀什|和田|阿克蘇");
where[32] = new comefrom("香港","");
where[33] = new comefrom("澳門","");
where[34] = new comefrom("臺灣","|臺北|高雄|臺中|臺南|屏東|南投|雲林|新竹|彰化|苗栗|嘉義|花蓮|桃園|宜蘭|基隆|臺東|金門|馬祖|澎湖");
where[35] = new comefrom("其它","|北美洲|南美洲|亞洲|非洲|歐洲|大洋洲");
function select() {
with(document.creator.province) { var loca2 = options[selectedIndex].value; }
for(i = 0;i < where.length;i ++) {
if (where[i].loca == loca2) {
loca3 = (where[i].locacity).split("|");
for(j = 0;j < loca3.length;j++) { with(document.creator.city) { length = loca3.length; options[j].text = loca3[j]; options[j].value = loca3[j]; var loca4=options[selectedIndex].value;}}
break;
}}
document.creator.newlocation.value=loca2+loca4;
}
function init() {
with(document.creator.province) {
length = where.length;
for(k=0;k<where.length;k++) { options[k].text = where[k].loca; options[k].value = where[k].loca; }
options[selectedIndex].text = where[0].loca; options[selectedIndex].value = where[0].loca;
}
with(document.creator.city) {
loca3 = (where[0].locacity).split("|");
length = loca3.length;
for(l=0;l<length;l++) { options[l].text = loca3[l]; options[l].value = loca3[l]; }
options[selectedIndex].text = loca3[0]; options[selectedIndex].value = loca3[0];
}} html代碼：
<body οnlοad="init()">
<font color=#000000><b>來自：</b>
請輸入您所在國家的具體地方。此項可選
省份 <select name="province" onChange = "select()"></select> 城市 <select name="city" onChange = "select()"></select>
我在 <input type=text name="newlocation" maxlength=12 size=12 style="font-weight: bold"> 不能超過12個字符（6個漢字）
