本文目录一览：
- 1、怎样用js实现省市联动,数据是从数据库读取？ 谢谢了
- 2、JavaScript实现省市县级联
- 3、如何用js实现省市区之间的三级联动
- 4、用JS实现省市下拉框怎么做?
- 5、省市区下拉框信息，怎样使用js显示到文本域textarea?
- 6、省市区 下拉菜单 js 怎么验证
怎样用js实现省市联动,数据是从数据库读取？ 谢谢了
省市联动，要去读数据库就慢了点，而且用的资源也多
由于省市数据是固定的，通常，我会独立定义一个js文件，里面是一个json数据，分级存储省市数据，每个地区都有一个六位的代码，就是你身份证的前六位，那是精确到县级的~
当然，如果你只需要到地级市，那就弄两级的就行啦
js读取js，是很快的~
JavaScript实现省市县级联
写的似乎有点麻烦，不如直接在下拉列表的Option里添加。
我简单给你写个。
script language="javascript"
var arr=new Array();
arr["广州01"]=["东城区","东城区","越秀区"];
arr["广州02"]=["萝岗区","天河区","南沙区"];
arr["广州03"]=["越秀区","盐田区","龙岗区"];
function Test()
{
var province=document.getElementById("province").value;
var district=document.getElementById("district");
//清空
district.length=1;
for(var i=0;iarr[province].length;i++)
{
var opt=new Option(arr[province][i],arr[province][i]);
district.options.add(opt);
}
}
/script
body
select id="province" onchange="Test()"
option--请选择--/option
option value="广州01"广州01/option
option value="广州02"广州02/option
option value="广州03"广州03/option
/select
select id="district"option--请选择--/option/select
/body
如何用js实现省市区之间的三级联动
页面中获取值并判断的js如下：
script type="text/javascript"
//这个函数是必须的，因为在area.js里每次更改地址时会调用此函数
function promptinfo()
{
var address = document.getElementById('address');
var s1 = document.getElementById('s1');
var s2 = document.getElementById('s2');
var town1 = document.getElementById('town1');
用JS实现省市下拉框怎么做?
试试这个：
script language="JavaScript"
!--
var g_selProvince;
var g_selCity;
var Provinces=new Array(
new Array("110000","北京市"),
new Array("120000","天津市"),
new Array("130000","河北省"),
new Array("140000","山西省"),
new Array("150000","内蒙古自治区"),
new Array("210000","辽宁省"),
new Array("220000","吉林省"),
new Array("230000","黑龙江省"),
new Array("310000","上海市"),
new Array("320000","江苏省"),
new Array("330000","浙江省"),
new Array("340000","安徽省"),
new Array("350000","福建省"),
new Array("360000","江西省"),
new Array("370000","山东省"),
new Array("410000","河南省"),
new Array("420000","湖北省"),
new Array("430000","湖南省"),
new Array("440000","广东省"),
new Array("450000","广西壮族自治区"),
new Array("460000","海南省"),
new Array("500000","重庆市"),
new Array("510000","四川省"),
new Array("520000","贵州省"),
new Array("530000","云南省"),
new Array("540000","西藏自治区"),
new Array("610000","陕西省"),
new Array("620000","甘肃省"),
new Array("630000","青海省"),
new Array("640000","宁夏回族自治区"),
new Array("650000","新疆维吾尔自治区"),
new Array("710000","台湾省"),
new Array("810000","香港特别行政区"),
new Array("820000","澳门特别行政区")
);
var Citys=new Array(
new Array("110100","北京"),
new Array("120100","天津"),
new Array("130101","石家庄"),
new Array("130201","唐山"),
new Array("130301","秦皇岛"),
new Array("130701","张家口"),
new Array("130801","承德"),
new Array("131001","廊坊"),
new Array("130401","邯郸"),
new Array("130501","邢台"),
new Array("130601","保定"),
new Array("130901","沧州"),
new Array("133001","衡水"),
new Array("140101","太原"),
new Array("140201","大同"),
new Array("140301","阳泉"),
new Array("140501","晋城"),
new Array("140601","朔州"),
new Array("142201","忻州"),
new Array("142331","离石"),
new Array("142401","榆次"),
new Array("142601","临汾"),
new Array("142701","运城"),
new Array("140401","长治"),
new Array("150101","呼和浩特"),
new Array("150201","包头"),
new Array("150301","乌海"),
new Array("152601","集宁"),
new Array("152701","东胜"),
new Array("152801","临河"),
new Array("152921","阿拉善左旗"),
new Array("150401","赤峰"),
new Array("152301","通辽"),
new Array("152502","锡林浩特"),
new Array("152101","海拉尔"),
new Array("152201","乌兰浩特"),
new Array("210101","沈阳"),
new Array("210201","大连"),
new Array("210301","鞍山"),
new Array("210401","抚顺"),
new Array("210501","本溪"),
new Array("210701","锦州"),
new Array("210801","营口"),
new Array("210901","阜新"),
new Array("211101","盘锦"),
new Array("211201","铁岭"),
new Array("211301","朝阳"),
new Array("211401","锦西"),
new Array("210601","丹东"),
new Array("220101","长春"),
new Array("220201","吉林"),
new Array("220301","四平"),
new Array("220401","辽源"),
new Array("220601","浑江"),
new Array("222301","白城"),
new Array("222401","延吉"),
new Array("220501","通化"),
new Array("230101","哈尔滨"),
new Array("230301","鸡西"),
new Array("230401","鹤岗"),
new Array("230501","双鸭山"),
new Array("230701","伊春"),
new Array("230801","佳木斯"),
new Array("230901","七台河"),
new Array("231001","牡丹江"),
new Array("232301","绥化"),
new Array("230201","齐齐哈尔"),
new Array("230601","大庆"),
new Array("232601","黑河"),
new Array("232700","加格达奇"),
new Array("310100","上海"),
new Array("320101","南京"),
new Array("320201","无锡"),
new Array("320301","徐州"),
new Array("320401","常州"),
new Array("320501","苏州"),
new Array("320600","南通"),
new Array("320701","连云港"),
new Array("320801","淮阴"),
new Array("320901","盐城"),
new Array("321001","扬州"),
new Array("321101","镇江"),
new Array("330101","杭州"),
new Array("330201","宁波"),
new Array("330301","温州"),
new Array("330401","嘉兴"),
new Array("330501","湖州"),
new Array("330601","绍兴"),
new Array("330701","金华"),
new Array("330801","衢州"),
new Array("330901","舟山"),
new Array("332501","丽水"),
new Array("332602","临海"),
new Array("340101","合肥"),
new Array("340201","芜湖"),
new Array("340301","蚌埠"),
new Array("340401","淮南"),
new Array("340501","马鞍山"),
new Array("340601","淮北"),
new Array("340701","铜陵"),
new Array("340801","安庆"),
new Array("341001","黄山"),
new Array("342101","阜阳"),
new Array("342201","宿州"),
new Array("342301","滁州"),
new Array("342401","六安"),
new Array("342501","宣州"),
new Array("342601","巢湖"),
new Array("342901","贵池"),
new Array("350101","福州"),
new Array("350201","厦门"),
new Array("350301","莆田"),
new Array("350401","三明"),
new Array("350501","泉州"),
new Array("350601","漳州"),
new Array("352101","南平"),
new Array("352201","宁德"),
new Array("352601","龙岩"),
new Array("360101","南昌"),
new Array("360201","景德镇"),
new Array("362101","赣州"),
new Array("360301","萍乡"),
new Array("360401","九江"),
new Array("360501","新余"),
new Array("360601","鹰潭"),
new Array("362201","宜春"),
new Array("362301","上饶"),
new Array("362401","吉安"),
new Array("362502","临川"),
new Array("370101","济南"),
new Array("370201","青岛"),
new Array("370301","淄博"),
new Array("370401","枣庄"),
new Array("370501","东营"),
new Array("370601","烟台"),
new Array("370701","潍坊"),
new Array("370801","济宁"),
new Array("370901","泰安"),
new Array("371001","威海"),
new Array("371100","日照"),
new Array("372301","滨州"),
new Array("372401","德州"),
new Array("372501","聊城"),
new Array("372801","临沂"),
new Array("372901","菏泽"),
new Array("410101","郑州"),
new Array("410201","开封"),
new Array("410301","洛阳"),
new Array("410401","平顶山"),
new Array("410501","安阳"),
new Array("410601","鹤壁"),
new Array("410701","新乡"),
new Array("410801","焦作"),
new Array("410901","濮阳"),
new Array("411001","许昌"),
new Array("411101","漯河"),
new Array("411201","三门峡"),
new Array("412301","商丘"),
new Array("412701","周口"),
new Array("412801","驻马店"),
new Array("412901","南阳"),
new Array("413001","信阳"),
new Array("420101","武汉"),
new Array("420201","黄石"),
new Array("420301","十堰"),
new Array("420400","沙市"),
new Array("420501","宜昌"),
new Array("420601","襄樊"),
new Array("420701","鄂州"),
new Array("420801","荆门"),
new Array("422103","黄州"),
new Array("422201","孝感"),
new Array("422301","咸宁"),
new Array("422421","江陵"),
new Array("422801","恩施"),
new Array("430101","长沙"),
new Array("430401","衡阳"),
new Array("430501","邵阳"),
new Array("432801","郴州"),
new Array("432901","永州"),
new Array("430801","大庸"),
new Array("433001","怀化"),
new Array("433101","吉首"),
new Array("430201","株洲"),
new Array("430301","湘潭"),
new Array("430601","岳阳"),
new Array("430701","常德"),
new Array("432301","益阳"),
new Array("432501","娄底"),
new Array("440101","广州"),
new Array("440301","深圳"),
new Array("441501","汕尾"),
new Array("441301","惠州"),
new Array("441601","河源"),
new Array("440601","佛山"),
new Array("441801","清远"),
new Array("441901","东莞"),
new Array("440401","珠海"),
new Array("440701","江门"),
new Array("441201","肇庆"),
new Array("442001","中山"),
new Array("440801","湛江"),
new Array("440901","茂名"),
new Array("440201","韶关"),
new Array("440501","汕头"),
new Array("441401","梅州"),
new Array("441701","阳江"),
new Array("450101","南宁"),
new Array("450401","梧州"),
new Array("452501","玉林"),
new Array("450301","桂林"),
new Array("452601","百色"),
new Array("452701","河池"),
new Array("452802","钦州"),
new Array("450201","柳州"),
new Array("450501","北海"),
new Array("460100","海口"),
new Array("460200","三亚"),
new Array("510101","成都"),
new Array("513321","康定"),
new Array("513101","雅安"),
new Array("513229","马尔康"),
new Array("510301","自贡"),
new Array("500100","重庆"),
new Array("512901","南充"),
new Array("510501","泸州"),
new Array("510601","德阳"),
new Array("510701","绵阳"),
new Array("510901","遂宁"),
new Array("511001","内江"),
new Array("511101","乐山"),
new Array("512501","宜宾"),
new Array("510801","广元"),
new Array("513021","达县"),
new Array("513401","西昌"),
new Array("510401","攀枝花"),
new Array("500239","黔江土家族苗族自治县"),
new Array("520101","贵阳"),
new Array("520200","六盘水"),
new Array("522201","铜仁"),
new Array("522501","安顺"),
new Array("522601","凯里"),
new Array("522701","都匀"),
new Array("522301","兴义"),
new Array("522421","毕节"),
new Array("522101","遵义"),
new Array("530101","昆明"),
new Array("530201","东川"),
new Array("532201","曲靖"),
new Array("532301","楚雄"),
new Array("532401","玉溪"),
new Array("532501","个旧"),
new Array("532621","文山"),
new Array("532721","思茅"),
new Array("532101","昭通"),
new Array("532821","景洪"),
new Array("532901","大理"),
new Array("533001","保山"),
new Array("533121","潞西"),
new Array("533221","丽江纳西族自治县"),
new Array("533321","泸水"),
new Array("533421","中甸"),
new Array("533521","临沧"),
new Array("540101","拉萨"),
new Array("542121","昌都"),
new Array("542221","乃东"),
new Array("542301","日喀则"),
new Array("542421","那曲"),
new Array("542523","噶尔"),
new Array("542621","林芝"),
new Array("610101","西安"),
new Array("610201","铜川"),
new Array("610301","宝鸡"),
new Array("610401","咸阳"),
new Array("612101","渭南"),
new Array("612301","汉中"),
new Array("612401","安康"),
new Array("612501","商州"),
new Array("612601","延安"),
new Array("612701","榆林"),
new Array("620101","兰州"),
new Array("620401","白银"),
new Array("620301","金昌"),
new Array("620501","天水"),
new Array("622201","张掖"),
new Array("622301","武威"),
new Array("622421","定西"),
new Array("622624","成县"),
new Array("622701","平凉"),
new Array("622801","西峰"),
new Array("622901","临夏"),
new Array("623027","夏河"),
new Array("620201","嘉峪关"),
new Array("622102","酒泉"),
new Array("630100","西宁"),
new Array("632121","平安"),
new Array("632221","门源回族自治县"),
new Array("632321","同仁"),
new Array("632521","共和"),
new Array("632621","玛沁"),
new Array("632721","玉树"),
new Array("632802","德令哈"),
new Array("640101","银川"),
new Array("640201","石嘴山"),
new Array("642101","吴忠"),
new Array("642221","固原"),
new Array("650101","乌鲁木齐"),
new Array("650201","克拉玛依"),
new Array("652101","吐鲁番"),
new Array("652201","哈密"),
new Array("652301","昌吉"),
new Array("652701","博乐"),
new Array("652801","库尔勒"),
new Array("652901","阿克苏"),
new Array("653001","阿图什"),
new Array("653101","喀什"),
new Array("654101","伊宁"),
new Array("710001","台北"),
new Array("710002","基隆"),
new Array("710020","台南"),
new Array("710019","高雄"),
new Array("710008","台中"),
new Array("211001","辽阳"),
new Array("653201","和田"),
new Array("542200","泽当镇"),
new Array("542600","八一镇"),
new Array("820000","澳门"),
new Array("810000","香港")
);
function FillProvinces(selProvince)
{
selProvince.options[0]=new Option("请选择","000000");
for(i=0;iProvinces.length;i++)
{
selProvince.options[i+1]=new Option(Provinces[i][1],Provinces[i][0]);
}
selProvince.options[0].selected=true;
selProvince.length=i+1;
}
function FillCitys(selCity,ProvinceCode)
{
//if the province is a direct-managed city, like Beijing, shanghai, tianjin, chongqin,hongkong, macro
//need not "请选择选项"
if(ProvinceCode=="110000"||ProvinceCode=="120000"||ProvinceCode=="310000"
||ProvinceCode=="810000"||ProvinceCode=="820000"||ProvinceCode=="500000")
count=0;
else
{selCity.options[0]=new Option("请选择",ProvinceCode);
count=1;}
for(i=0;iCitys.length;i++)
{
if(Citys[i][0].toString().substring(0,2)==ProvinceCode.substring(0,2))
{
selCity.options[count]=new Option(Citys[i][1],Citys[i][0]);
count=count+1;
}
}
selCity.options[0].selected=true;
selCity.length=count;
}
function Province_onchange()
{
FillCitys(g_selCity,g_selProvince.value);
}
function InitCitySelect(selProvince,selCity)
{
//alert("begin");
g_selProvince=selProvince;
g_selCity=selCity;
selProvince.onchange=Function("Province_onchange();");
FillProvinces(selProvince);
Province_onchange();
}
function InitCitySelect2(selProvince,selCity,CityCode)
{
InitCitySelect(selProvince,selCity)
for(i=0;iselProvince.length;i++)
{
if(selProvince.options[i].value.substring(0,2)==CityCode.substring(0,2))
{
selProvince.options[i].selected=true;
}
}
Province_onchange();
for(i=0;iselCity.length;i++)
{
if(selCity.options[i].value==CityCode)
{
selCity.options[i].selected=true;
}
}
}
//--
/script
form name="profile" method="post" action="where.asp"
SELECT id=province size=1 name=province
OPTION selected/OPTION
/SELECT
SELECT id=city size=1 name=city
OPTION selected/OPTION
/SELECT
SCRIPT language=javascript
InitCitySelect(document.profile.province,document.profile.city);
/SCRIPT
input type="submit"
/form
如你要提取市的数据，你需要在接受请求页面写如下代码：
shi=trim(request.form("city"))
就可以得到市的值了。
还有这是用Form传递参数，而不是用QueryString传递。
省市区下拉框信息，怎样使用js显示到文本域textarea?
这段代码基本可以实现你的需求了，但是有些小问题，第一个下拉框的onclick改为onchange，最后一个下拉框调用方法传值时要传3，给所有option加上value，值为option中间的省市区信息
这些变量定义时最好给默认值，为‘’就行，如var x_p = '';，然后把最后的注释去掉就可以了。
好像没有赋值呀，写成var x_p = document.getElementById("sel_p");，应该就可以了
省市区 下拉菜单 js 怎么验证
建议使用jq，先引入jq文件
先获取下拉框选项
var sheng = $("#省下拉框id").val();
var shi = $("#市下拉框id").val();
var qu = $("#区下拉框id").val();
对获取值验证，不知道你那还有什么限制规则，这里只写不能为空的验证
if(sheng == '' || sheng == 0){
alert("请选择省。");
return false;
}
剩下的市和区与上面的验证方法相同，改个验证值就行。
下面就是验证完成后的数据处理，通过了上面的验证后获得的省市区的值都是符合规则的值了，该提交的就提交。