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)

{

selProvinceoptions[0]=new Option("请选择","000000");

for(i=0;i<Provinceslength;i++)

{

selProvinceoptions[i+1]=new Option(Provinces[i][1],Provinces[i][0]);

}

selProvinceoptions[0]selected=true;

selProvincelength=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

{selCityoptions[0]=new Option("请选择",ProvinceCode);

count=1;}

for(i=0;i<Cityslength;i++)

{

if(Citys[i][0]toString()substring(0,2)==ProvinceCodesubstring(0,2))

{

selCityoptions[count]=new Option(Citys[i][1],Citys[i][0]);

count=count+1;

}

}

selCityoptions[0]selected=true;

selCitylength=count;

}

function Province_onchange()

{

FillCitys(g_selCity,g_selProvincevalue);

}

function InitCitySelect(selProvince,selCity)

{

//alert("begin");

g_selProvince=selProvince;

g_selCity=selCity;

selProvinceonchange=Function("Province_onchange();");

FillProvinces(selProvince);

Province_onchange();

}

function InitCitySelect2(selProvince,selCity,CityCode)

{

InitCitySelect(selProvince,selCity)

for(i=0;i<selProvincelength;i++)

{

if(selProvinceoptions[i]valuesubstring(0,2)==CityCodesubstring(0,2))

{

selProvinceoptions[i]selected=true;

}

}

Province_onchange();

for(i=0;i<selCitylength;i++)

{

if(selCityoptions[i]value==CityCode)

{

selCityoptions[i]selected=true;

}

}

}

//-->

</script>

<form name="profile" method="post" action="whereasp">

<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(documentprofileprovince,documentprofilecity);

</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(requestform("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。

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areajs里每次更改地址时会调用此函数

function promptinfo()

{

var address = documentgetElementById('address');

var s1 = documentgetElementById('s1');

var s2 = documentgetElementById('s2');

var town1 = documentgetElementById('town1');

你好 我只有中的 省市联动 ··贴上代码 供你做参考吧

//省份数组

var shenArr=["请选择省份/城市","北京市","上海市","天津市","重庆市","香港特别行政区","澳门特别行政区","湖南","辽宁","河北","山东","河南","湖北","福建","四川","江西"];

//自定义下标（属性）

//shenArr["名称"]

shenArr["请选择省份/城市"]=["请选择城市/地区"];

shenArr["北京市"]=["北京市"];

shenArr["上海市"]=["上海市"];

shenArr["天津市"]=["天津市"];

shenArr["重庆市"]=["重庆市"];

shenArr["香港特别行政区"]=["香港特别行政区"];

shenArr["澳门特别行政区"]=["澳门特别行政区"];

shenArr["福建"]=["福州市","厦门市","泉州市","漳州市","南平市","三明市","龙岩市","莆田市"];

shenArr["湖南"]=["长沙市","株洲市","湘潭市","郴州市","益阳市","娄底市","衡阳市","常德市"];

shenArr["辽宁"]=["沈阳市","大连市","抚顺市","鞍山市","铁岭市","本溪市","丹东市","锦州市"];

shenArr["河北"]=["保定市","唐山市","邯郸市","邢台市","沧州市","衡水市","廊坊市","承德市"];

shenArr["山东"]=["济南市","青岛市","威海市","潍坊市","菏泽市","济宁市","莱芜市","烟台市"];

shenArr["河南"]=["洛阳市","焦作市","商丘市","信阳市","周口市","鹤壁市","安阳市","濮阳市"];

shenArr["湖北"]=["武汉市","荆门市","汉口市","咸宁市","襄樊市","荆州市","黄石市","孝感市"];

shenArr["江西"]=["南昌市","赣州市","上饶市","宜春市","吉安市","抚州市","萍乡市","九江市"];

$each(shenArr,function(i,val){

//添加下拉项

$("select[name=sheng]")append("<option value='"+val+"'>"+val+"</option>");

});

//市级下拉框绑定

$("select[name=sheng]")change(function(){

var index=$(this)val();

var shiArr=shenArr[index];

$("select[name=shi]")empty();

$each(shiArr,function(i,val){

//添加下拉项

$("select[name=shi]")append("<option value='"+val+"'>"+val+"</option>");

});

});

<select name="sheng"></select>&nbsp

<select name="shi">

<option>请选择城市/地区</option>

</select>

希望能帮到你 谢谢

a","b","c","d"];

arr[1]=["c++","oracle","sql","js"];数组下标为0的有"a","b","c","d";

数组下标为1的有"c++","oracle","sql","js"，

var i=documentform1seltermselectedIndex-1;这句话其实跟op=new Option(arr[i][j],arr[i][j]);有关，举个例子，选择1学期的时候，documentform1seltermselectedIndex为1，-1之后为0，然后找到arr[0]，也就是["a","b","c","d"]），然后new出一个Option(arr[0][j],arr[0][j]);（一个option包含显示的内容和value值。)在清空之后，select下面是空的，必须加一个请选择的option填充，其实把下标修改一下，arr[1]=["a","b","c","d"];

arr[2]=["c++","oracle","sql","js"];这时候var i=documentform1seltermselectedIndex就可以了，不需要减1了，不知道你是否明白意思了

另外,虚机团上产品团购,超级便宜

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