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js implements the effect code of cascading drop-down menus in provinces and cities across the country_javascript skills
js implements the effect code of cascading drop-down menus in provinces and cities across the country_javascript skills
The example in this article describes the js implementation code for the cascading drop-down menu effect of provinces and cities across the country. Share it with everyone for your reference. The details are as follows:
This is a small web page function that everyone knows. It is very common. The cascading menu of provinces and cities across the country uses the Select drop-down method to select data. However, many of them now use Ajax. It seems that this old form is outdated, but In terms of compatibility, it still doesn't lag behind.
The screenshot of the running effect is as follows:
The online demo address is as follows:
http://demo.jb51.net/js/2015/js-conv-city-xl-menu-style-codes/
The specific code is as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>全国省份城市级联下拉菜单</title>
</head>
<body>
<script language="javascript">
cityareaname=new Array(35);
cityareacode=new Array(35);
function first(preP,preC,formname,selectP,selectC)
{
a=0;
if (selectP=='01')
{ a=1;tempoption=new Option('北京','01',false,true); }
else
{ tempoption=new Option('北京','01'); }
eval('document.'+formname+'.'+preP+'.options[1]=tempoption;');
cityareacode[0]=new Array('0101','0102','0103','0104','0105','0106','0107','0108');
cityareaname[0]=new Array('东城区','西城区','崇文区','宣武区','朝阳区','海淀区','丰台区','石景山');
if (selectP=='02')
{ a=2;tempoption=new Option('深圳','02',false,true); }
else
{ tempoption=new Option('深圳','02'); }
eval('document.'+formname+'.'+preP+'.options[2]=tempoption;');
cityareacode[1]=new Array('0201','0202','0203','0204','0205','0206');
cityareaname[1]=new Array('罗湖','福田','南山','盐田','宝安','龙岗');
if (selectP=='03')
{ a=3;tempoption=new Option('上海','03',false,true); }
else
{ tempoption=new Option('上海','03'); }
eval('document.'+formname+'.'+preP+'.options[3]=tempoption;');
cityareacode[2]=new Array('0301','0302','0303','0304','0305','0306','0307','0308','0309','0310','0311','0312','0313','0314','0315','0316','0317','0318','0319','0320');
cityareaname[2]=new Array('宝山','金山','南市','长宁','静安','青浦','崇明','卢湾','松江','奉贤','浦东','杨浦','虹口','普陀','闸北','黄浦','闵行','徐汇','嘉定','南汇');
if (selectP=='04')
{ a=4;tempoption=new Option('重庆','04',false,true); }
else
{ tempoption=new Option('重庆','04'); }
eval('document.'+formname+'.'+preP+'.options[4]=tempoption;');
cityareacode[3]=new Array('0401','0402','0403','0404','0405','0406');
cityareaname[3]=new Array('渝中','江北','沙坪坝','南岸','九龙坡','大渡口');
if (selectP=='05')
{ a=5;tempoption=new Option('天津','05',false,true); }
else
{ tempoption=new Option('天津','05'); }
eval('document.'+formname+'.'+preP+'.options[5]=tempoption;');
cityareacode[4]=new Array('0501','0502','0503','0504','0505','0506','0507','0508','0509','0510','0511','0512','0513','0514','0515');
cityareaname[4]=new Array('和平','河北','河西','河东','南开','红桥','塘沽','汉沽','大港','东丽','西青','津南','北辰','武清','滨海');
if (selectP=='06')
{ a=6;tempoption=new Option('广东','06',false,true); }
else
{ tempoption=new Option('广东','06'); }
eval('document.'+formname+'.'+preP+'.options[6]=tempoption;');
cityareacode[5]=new Array('0601','0602','0603','0604','0605','0606','0607','0608','0609','0610','0611','0612','0613','0614','0615');
cityareaname[5]=new Array('广州','珠海','中山','佛山','东莞','清远','肇庆','阳江','湛江','韶关','惠州','河源','汕尾','汕头','梅州');
if (selectP=='07')
{ a=7;tempoption=new Option('河北','07',false,true); }
else
{ tempoption=new Option('河北','07'); }
eval('document.'+formname+'.'+preP+'.options[7]=tempoption;');
cityareacode[6]=new Array('0701','0702','0703','0704','0705','0706','0707','0708','0709','0710','0711');
cityareaname[6]=new Array('石家庄','唐山','秦皇岛','邯郸','邢台','张家口','承德','廊坊','沧州','保定','衡水');
if (selectP=='08')
{ a=8;tempoption=new Option('山西','08',false,true); }
else
{ tempoption=new Option('山西','08'); }
eval('document.'+formname+'.'+preP+'.options[8]=tempoption;');
cityareacode[7]=new Array('0801','0802','0803','0804','0805','0806','0807');
cityareaname[7]=new Array('太原','大同','阳泉','朔州','长治','临汾','晋城');
if (selectP=='09')
{ a=9;tempoption=new Option('内蒙古','09',false,true); }
else
{ tempoption=new Option('内蒙古','09'); }
eval('document.'+formname+'.'+preP+'.options[9]=tempoption;');
cityareacode[8]=new Array('0901','0902','0903','0904','0905','0906','0907','0908','0909','0910','0911');
cityareaname[8]=new Array('呼和浩特','包头','乌海','临河','东胜','集宁','锡林浩特','通辽','赤峰','海拉尔','乌兰浩特');
if (selectP=='10')
{ a=10;tempoption=new Option('辽宁','10',false,true); }
else
{ tempoption=new Option('辽宁','10'); }
eval('document.'+formname+'.'+preP+'.options[10]=tempoption;');
cityareacode[9]=new Array('1001','1002','1003','1004','1005','1006','1007','1008','1009','1010','1011','1012','1013','1014');
cityareaname[9]=new Array('沈阳','大连','鞍山','锦州','丹东','盘锦','铁岭','抚顺','营口','辽阳','阜新','本溪','朝阳','葫芦岛');
if (selectP=='11')
{ a=11;tempoption=new Option('吉林','11',false,true); }
else
{ tempoption=new Option('吉林','11'); }
eval('document.'+formname+'.'+preP+'.options[11]=tempoption;');
cityareacode[10]=new Array('1101','1102','1103','1104','1105','1106','1107','1108','1109');
cityareaname[10]=new Array('长春','吉林','四平','辽源','通化','白山','松原','白城','延边');
if (selectP=='12')
{ a=12;tempoption=new Option('黑龙江','12',false,true); }
else
{ tempoption=new Option('黑龙江','12'); }
eval('document.'+formname+'.'+preP+'.options[12]=tempoption;');
cityareacode[11]=new Array('1201','1202','1203','1204','1205','1206','1207','1208','1209','1210','1211','1212','1213');
cityareaname[11]=new Array('哈尔滨','齐齐哈尔','牡丹江','佳木斯','大庆','伊春','黑河','鸡西','鹤岗','双鸭山','七台河','绥化','大兴安岭');
if (selectP=='13')
{ a=13;tempoption=new Option('江苏','13',false,true); }
else
{ tempoption=new Option('江苏','13'); }
eval('document.'+formname+'.'+preP+'.options[13]=tempoption;');
cityareacode[12]=new Array('1301','1302','1303','1304','1305','1306','1307','1308','1309','1310','1311','1312','1313');
cityareaname[12]=new Array('南京','苏州','无锡','常州','镇江','连云港 ','扬州','徐州 ','南通','盐城','淮阴','泰州','宿迁');
if (selectP=='14')
{ a=14;tempoption=new Option('浙江','14',false,true); }
else
{ tempoption=new Option('浙江','14'); }
eval('document.'+formname+'.'+preP+'.options[14]=tempoption;');
cityareacode[13]=new Array('1401','1402','1403','1404','1405','1406','1407','1408','1409','1410','1411');
cityareaname[13]=new Array('杭州','湖州','丽水','温州','绍兴','舟山','嘉兴','金华','台州','衢州','宁波');
if (selectP=='15')
{ a=15;tempoption=new Option('安徽','15',false,true); }
else
{ tempoption=new Option('安徽','15'); }
eval('document.'+formname+'.'+preP+'.options[15]=tempoption;');
cityareacode[14]=new Array('1501','1502','1503','1504','1505','1506','1507','1508','1509','1510','1511','1512','1513','1514','1515','1516','1517');
cityareaname[14]=new Array('合肥 ','芜湖 ','蚌埠 ','滁州 ','安庆 ','六安 ','黄山 ','宣城 ','淮南 ','宿州 ','马鞍山 ','铜陵','淮北 ','阜阳 ','池州 ','巢湖 ','亳州');
if (selectP=='16')
{ a=16;tempoption=new Option('福建','16',false,true); }
else
{ tempoption=new Option('福建','16'); }
eval('document.'+formname+'.'+preP+'.options[16]=tempoption;');
cityareacode[15]=new Array('1601','1602','1603','1604','1605','1606','1607','1608','1609');
cityareaname[15]=new Array('福州 ','厦门 ','泉州 ','漳州 ','龙岩 ','南平 ','宁德 ','莆田 ','三明');
if (selectP=='17')
{ a=17;tempoption=new Option('江西','17',false,true); }
else
{ tempoption=new Option('江西','17'); }
eval('document.'+formname+'.'+preP+'.options[17]=tempoption;');
cityareacode[16]=new Array('1701','1702','1703','1704','1705','1706','1707','1708','1709','1710','1711');
cityareaname[16]=new Array('南昌','景德镇','九江','萍乡','新余','鹰潭','赣州','宜春','吉安','上饶','抚州');
if (selectP=='18')
{ a=18;tempoption=new Option('山东','18',false,true); }
else
{ tempoption=new Option('山东','18'); }
eval('document.'+formname+'.'+preP+'.options[18]=tempoption;');
cityareacode[17]=new Array('1801','1802','1803','1804','1805','1806','1807','1808','1809','1810','1811','1812','1813','1814','1815','1816','1817');
cityareaname[17]=new Array('济南','青岛','淄博','德州','烟台','潍坊','济宁','泰安','临沂','菏泽','威海','枣庄','日照','莱芜','聊城','滨州','东营');
if (selectP=='19')
{ a=19;tempoption=new Option('河南','19',false,true); }
else
{ tempoption=new Option('河南','19'); }
eval('document.'+formname+'.'+preP+'.options[19]=tempoption;');
cityareacode[18]=new Array('1901','1902','1903','1904','1905','1906','1907','1908','1909','1910','1911','1912','1913','1914','1915','1916','1917','1918');
cityareaname[18]=new Array('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','周口','驻马店','信阳','济源');
if (selectP=='20')
{ a=20;tempoption=new Option('湖北','20',false,true); }
else
{ tempoption=new Option('湖北','20'); }
eval('document.'+formname+'.'+preP+'.options[20]=tempoption;');
cityareacode[19]=new Array('2001','2002','2003','2004','2005','2006','2007','2008','2009','2010','2011','2012','2013','2014','2015','2016','2017');
cityareaname[19]=new Array('武汉','黄石','十堰','荆州','宜昌','襄樊','鄂州','荆门','孝感','黄冈','咸宁','恩施','随州','仙桃','天门','潜江','神农架');
if (selectP=='21')
{ a=21;tempoption=new Option('湖南','21',false,true); }
else
{ tempoption=new Option('湖南','21'); }
eval('document.'+formname+'.'+preP+'.options[21]=tempoption;');
cityareacode[20]=new Array('2101','2102','2103','2104','2105','2106','2107','2108','2109','2110','2111','2112','2113');
cityareaname[20]=new Array('长沙','株州','湘潭','衡阳','邵阳','岳阳','常德','郴州','益阳','永州','怀化','娄底','湘西 ');
if (selectP=='22')
{ a=22;tempoption=new Option('广西','22',false,true); }
else
{ tempoption=new Option('广西','22'); }
eval('document.'+formname+'.'+preP+'.options[22]=tempoption;');
cityareacode[21]=new Array('2201','2202','2203','2204','2205','2206','2207','2208','2209','2210','2211','2212');
cityareaname[21]=new Array('南宁','柳州','桂林','梧州','北海','防城港','钦州','贵港','玉林','贺州','百色','河池');
if (selectP=='23')
{ a=23;tempoption=new Option('海南','23',false,true); }
else
{ tempoption=new Option('海南','23'); }
eval('document.'+formname+'.'+preP+'.options[23]=tempoption;');
cityareacode[22]=new Array('2301','2302','2303','2304','2305','2306','2307','2308','2309');
cityareaname[22]=new Array('海口 ','三亚','通什','琼海','琼山','文昌','万宁','东方','儋州');
if (selectP=='24')
{ a=24;tempoption=new Option('四川','24',false,true); }
else
{ tempoption=new Option('四川','24'); }
eval('document.'+formname+'.'+preP+'.options[24]=tempoption;');
cityareacode[23]=new Array('2401','2402','2403','2404','2405','2406','2407','2408','2409','2410','2411','2412','2413','2414','2415','2416','2417','2418','2419','2420');
cityareaname[23]=new Array('成都','自贡','攀枝花','泸州','德阳','绵阳','广元','遂宁','内江','乐山','南充 ','宜宾','广安','达川','巴中','雅安','眉山 ','阿坝 ','甘孜 ','凉山 ');
if (selectP=='25')
{ a=25;tempoption=new Option('贵州','25',false,true); }
else
{ tempoption=new Option('贵州','25'); }
eval('document.'+formname+'.'+preP+'.options[25]=tempoption;');
cityareacode[24]=new Array('2501','2502','2503','2504','2505','2506','2507','2508','2509');
cityareaname[24]=new Array('贵阳 ','六盘水','遵义','铜仁','毕节','安顺','黔西南 ','黔东南','黔南');
if (selectP=='26')
{ a=26;tempoption=new Option('云南','26',false,true); }
else
{ tempoption=new Option('云南','26'); }
eval('document.'+formname+'.'+preP+'.options[26]=tempoption;');
cityareacode[25]=new Array('2601','2602','2603','2604','2605','2606','2607','2608','2609','2610','2611','2612','2613','2614','2615','2616','2617');
cityareaname[25]=new Array('昆明','东川','曲靖','玉溪','昭通','思茅','临沧','保山','丽江','文山 ','红河 ','西双版纳 ','楚雄 ','大理 ','德宏 ','怒江','迪庆');
if (selectP=='27')
{ a=27;tempoption=new Option('西藏','27',false,true); }
else
{ tempoption=new Option('西藏','27'); }
eval('document.'+formname+'.'+preP+'.options[27]=tempoption;');
cityareacode[26]=new Array('2701','2702','2703','2704','2705','2706','2707');
cityareaname[26]=new Array('拉萨','那曲','昌都','山南','日喀则','阿里','林芝');
if (selectP=='28')
{ a=28;tempoption=new Option('陕西','28',false,true); }
else
{ tempoption=new Option('陕西','28'); }
eval('document.'+formname+'.'+preP+'.options[28]=tempoption;');
cityareacode[27]=new Array('2801','2802','2803','2804','2805','2806','2807','2808','2809','2810');
cityareaname[27]=new Array('西安','铜川','宝鸡','咸阳','渭南','延安','汉中','榆林','商洛','安康');
if (selectP=='29')
{ a=29;tempoption=new Option('甘肃','29',false,true); }
else
{ tempoption=new Option('甘肃','29'); }
eval('document.'+formname+'.'+preP+'.options[29]=tempoption;');
cityareacode[28]=new Array('2901','2902','2903','2904','2905','2906','2907','2908','2909','2910','2911','2912','2913','2914');
cityareaname[28]=new Array('兰州','金昌','白银','天水','嘉峪关','定西','平凉','庆阳','陇南','武威','张掖','酒泉','甘南 ','临夏');
if (selectP=='30')
{ a=30;tempoption=new Option('青海','30',false,true); }
else
{ tempoption=new Option('青海','30'); }
eval('document.'+formname+'.'+preP+'.options[30]=tempoption;');
cityareacode[29]=new Array('3001','3002','3003','3004','3005','3006','3007','3008');
cityareaname[29]=new Array('西宁','海东',' 海北 ','黄南','海南','果洛','玉树','海西');
if (selectP=='31')
{ a=31;tempoption=new Option('宁夏','31',false,true); }
else
{ tempoption=new Option('宁夏','31'); }
eval('document.'+formname+'.'+preP+'.options[31]=tempoption;');
cityareacode[30]=new Array('3101','3102','3103','3104');
cityareaname[30]=new Array('银川','石嘴山','银南','固原');
if (selectP=='32')
{ a=32;tempoption=new Option('新疆','32',false,true); }
else
{ tempoption=new Option('新疆','32'); }
eval('document.'+formname+'.'+preP+'.options[32]=tempoption;');
cityareacode[31]=new Array('3201','3202','3203','3204','3205','3206','3207','3208','3209','3210','3211','3212','3213');
cityareaname[31]=new Array('乌鲁木齐','克拉玛依','石河子','吐鲁番','哈密','和田','阿克苏','喀什','克孜勒苏','巴音郭楞','昌吉','博尔塔拉','伊犁');
if (selectP=='33')
{ a=33;tempoption=new Option('香港','33',false,true); }
else
{ tempoption=new Option('香港','33'); }
eval('document.'+formname+'.'+preP+'.options[33]=tempoption;');
cityareacode[32]=new Array();
cityareaname[32]=new Array();
if (selectP=='34')
{ a=34;tempoption=new Option('澳门','34',false,true); }
else
{ tempoption=new Option('澳门','34'); }
eval('document.'+formname+'.'+preP+'.options[34]=tempoption;');
cityareacode[33]=new Array();
cityareaname[33]=new Array();
if (selectP=='35')
{ a=35;tempoption=new Option('台湾','35',false,true); }
else
{ tempoption=new Option('台湾','35'); }
eval('document.'+formname+'.'+preP+'.options[35]=tempoption;');
cityareacode[34]=new Array();
cityareaname[34]=new Array();
eval('document.'+formname+'.'+preP+'.options[a].selected=true;');
cityid=selectP;
if (cityid!='0')
{
b=0;for (i=0;i<cityareaname[cityid-1].length;i++)
{
if (selectC==cityareacode[cityid-1][i])
{b=i+1;tempoption=new Option(cityareaname[cityid-1][i],cityareacode[cityid-1][i],false,true);}
else
tempoption=new Option(cityareaname[cityid-1][i],cityareacode[cityid-1][i]);
eval('document.'+formname+'.'+preC+'.options[i+1]=tempoption;');
}
eval('document.'+formname+'.'+preC+'.options[b].selected=true;');
}
}
function selectcityarea(preP,preC,formname)
{
cityid=eval('document.'+formname+'.'+preP+'.selectedIndex;');
j=eval('document.'+formname+'.'+preC+'.length;');
for (i=1;i<j;i++)
{eval('document.'+formname+'.'+preC+'.options[j-i]=null;')}
if (cityid!="0")
{
for (i=0;i<cityareaname[cityid-1].length;i++)
{
tempoption=new Option(cityareaname[cityid-1][i],cityareacode[cityid-1][i]);
eval('document.'+formname+'.'+preC+'.options[i+1]=tempoption;');
}
}
}
</script>
<form action="" method=post name=form1>
<img src="images/w_KT.gif" height="6" width="1"><br>
<table width=300 border=0 cellspacing="0" cellpadding="1" !bgcolor=#FFFDE6>
<tr>
<td class="black_con9" align="right">省份：</td>
<td class="black_con9">
<select name="selectp" onChange="selectcityarea('selectp','selectc','form1');">
<option value="0" selected>不限--
</select>
</td>
</tr>
<tr>
<td class="black_con9" align="right">县/市：</td>
<td class="black_con9">
<select name="selectc">
<option value="0" selected>不限--
</select>
</td>
</tr>
</table>
</form>
<script language="javascript">
first("selectp","selectc","form1",0,0);
</script>
</body>
</html>
I hope this article will be helpful to everyone’s JavaScript programming.
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How to make drop-down menu in WPS table
Mar 21, 2024 pm 01:31 PM
How to make the WPS table drop-down menu: After selecting the cell where you want to set the drop-down menu, click "Data", "Validity" in sequence, and then make the corresponding settings in the pop-up dialog box to pull down our menu. As a powerful office software, WPS has the ability to edit documents, statistical data tables, etc., which provides a lot of convenience for many people who need to deal with text, data, etc. In order to skillfully use WPS software to provide us with a lot of convenience, we need to be able to master various very basic operations of WPS software. In this article, the editor will share with you how to use WPS software. Perform drop-down menu operations in the WPS table that appears. After opening the WPS form, first select the
How to use JS and Baidu Maps to implement map pan function
Nov 21, 2023 am 10:00 AM
How to use JS and Baidu Map to implement map pan function Baidu Map is a widely used map service platform, which is often used in web development to display geographical information, positioning and other functions. This article will introduce how to use JS and Baidu Map API to implement the map pan function, and provide specific code examples. 1. Preparation Before using Baidu Map API, you first need to apply for a developer account on Baidu Map Open Platform (http://lbsyun.baidu.com/) and create an application. Creation completed
Recommended: Excellent JS open source face detection and recognition project
Apr 03, 2024 am 11:55 AM
Face detection and recognition technology is already a relatively mature and widely used technology. Currently, the most widely used Internet application language is JS. Implementing face detection and recognition on the Web front-end has advantages and disadvantages compared to back-end face recognition. Advantages include reducing network interaction and real-time recognition, which greatly shortens user waiting time and improves user experience; disadvantages include: being limited by model size, the accuracy is also limited. How to use js to implement face detection on the web? In order to implement face recognition on the Web, you need to be familiar with related programming languages and technologies, such as JavaScript, HTML, CSS, WebRTC, etc. At the same time, you also need to master relevant computer vision and artificial intelligence technologies. It is worth noting that due to the design of the Web side
How to create a stock candlestick chart using PHP and JS
Dec 17, 2023 am 08:08 AM
How to use PHP and JS to create a stock candle chart. A stock candle chart is a common technical analysis graphic in the stock market. It helps investors understand stocks more intuitively by drawing data such as the opening price, closing price, highest price and lowest price of the stock. price fluctuations. This article will teach you how to create stock candle charts using PHP and JS, with specific code examples. 1. Preparation Before starting, we need to prepare the following environment: 1. A server running PHP 2. A browser that supports HTML5 and Canvas 3
Essential tools for stock analysis: Learn the steps to draw candle charts with PHP and JS
Dec 17, 2023 pm 06:55 PM
Essential tools for stock analysis: Learn the steps to draw candle charts in PHP and JS. Specific code examples are required. With the rapid development of the Internet and technology, stock trading has become one of the important ways for many investors. Stock analysis is an important part of investor decision-making, and candle charts are widely used in technical analysis. Learning how to draw candle charts using PHP and JS will provide investors with more intuitive information to help them make better decisions. A candlestick chart is a technical chart that displays stock prices in the form of candlesticks. It shows the stock price
How to use JS and Baidu Map to implement map click event processing function
Nov 21, 2023 am 11:11 AM
Overview of how to use JS and Baidu Maps to implement map click event processing: In web development, it is often necessary to use map functions to display geographical location and geographical information. Click event processing on the map is a commonly used and important part of the map function. This article will introduce how to use JS and Baidu Map API to implement the click event processing function of the map, and give specific code examples. Steps: Import the API file of Baidu Map. First, import the file of Baidu Map API in the HTML file. This can be achieved through the following code:
How to use JS and Baidu Maps to implement map heat map function
Nov 21, 2023 am 09:33 AM
How to use JS and Baidu Maps to implement the map heat map function Introduction: With the rapid development of the Internet and mobile devices, maps have become a common application scenario. As a visual display method, heat maps can help us understand the distribution of data more intuitively. This article will introduce how to use JS and Baidu Map API to implement the map heat map function, and provide specific code examples. Preparation work: Before starting, you need to prepare the following items: a Baidu developer account, create an application, and obtain the corresponding AP
Implement the drop-down menu effect in WeChat applet
Nov 21, 2023 pm 03:03 PM
To implement the drop-down menu effect in WeChat Mini Programs, specific code examples are required. With the popularity of mobile Internet, WeChat Mini Programs have become an important part of Internet development, and more and more people have begun to pay attention to and use WeChat Mini Programs. The development of WeChat mini programs is simpler and faster than traditional APP development, but it also requires mastering certain development skills. In the development of WeChat mini programs, drop-down menus are a common UI component, achieving a better user experience. This article will introduce in detail how to implement the drop-down menu effect in the WeChat applet and provide practical
