那你要用Ajax分别远程调用了~这样做的话肯定会有延时~思路可以给你，但是代码就算了~太费劲了~而且要和后台交互
思路就是写一个函数，这个函数可以接受一个参数，这个参数就是你每次点选的那个值，然后通过AJAX把这个参数传给后台，通过数据库查出来之后把内容赋给二级列表，以此类推，不光可以三级联动，N级都可以~
这个很难。。。
因为你给的代码不完整
在不知道你这个td是第几个td时，是无法写出来的
不过你可以用JQ代码来写，
$("img")each(function(){
if($(this)text()=="你好"){alert($(this)text())//这行只是一个例子，你可以修改成成其它}
});
建议你去>
JS数字对应地点是指地理位置的信息与数字之间的对应关系，在JavaScript编程中常用于实现根据地理位置来展示地图或其他相关信息的功能。通常，数字代表了地球表面上的经纬度，而地点则是对应这些经纬度的地名或地区。
在JavaScript中，可以使用数组、对象或函数等方式将地理位置信息与数字进行对应。其中，数组可以通过索引值来快速访问对应的地点信息，例如：
```
var locations = ["Beijing", "Tokyo", "New York"];
var longitude = [1164074, 1396917, -740059];
var latitude = [399042, 356895, 407128];
```
以上代码中，数组`locations`、`longitude`和`latitude`中的元素位置相同，即取数组中同一索引位置上的元素就能得到对应的地点和经纬度信息。
对象的实现方式与数组相同，只不过将多个键值对的形式用对象来表示，例如：
```
var positions = {
"Beijing": [1164074, 399042],
"Tokyo": [1396917, 356895],
"New York": [-740059, 407128]
};
```
以上代码中，对象`positions`的键都是地点名称，对应的值是经纬度信息的数组。
函数的方式可以根据输入的数字参数返回对应的地点信息，例如：
```
function getLocation(number) {
switch(number) {
case 1:
return "Beijing";
break;
case 2:
return "Tokyo";
break;
case 3:
return "New York";
break;
default:
return "Unknown";
}
}
```
以上代码中，定义了`getLocation`函数，根据传入的数字参数，返回对应的地点名称信息。
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。
以上就是关于jquery或js实现省市县三级联动下拉列表，要能用的带注释的最好，省市县数据从数据库中读出来的全部的内容，包括:jquery或js实现省市县三级联动下拉列表，要能用的带注释的最好，省市县数据从数据库中读出来的、JS获取指定区域内的值、js数字对应地点怎么输入等相关内容解答，如果想了解更多相关内容，可以关注我们，你们的支持是我们更新的动力！
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