升级联动啊。这个是从数据库取出来的还是js、写好的。我这有省级联动的例子你看下。
index.html
<!DOCTYPE html><html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<div>
<select id="province" name="province" onchange="getCity(this)">
<option value="">--请选择--</option>
</select>省
<select id="city" name="city" onchange="getDistrict(this)">
<option value="">--请选择--</option>
</select>市
<select id="district" name="district">
<option value="">--请选择--</option>
</select>区/县
</div>
<script type="text/javascript" src="js/data.js" ></script>
<script type="text/javascript">
/**
* 自调用函数，页面加载所用省份数据
* @param {Object} provice 传入js中的变量proviceJson
*/
(function(provice){
// 1.禁用城市和区县乡下拉框
var city = document.getElementById("city")
var district = document.getElementById("district")
city.disabled = "disabled"
district.disabled = "disabled"
// 2.加载所有省份
for (var i = 0 i < provice.length i++) {
var provinceOption = document.createElement("option")
var provinceSelect = document.getElementById("province")
provinceOption.innerText = provice[i].name
provinceOption.value = i//循环变量i作为option的value属性值
provinceSelect.appendChild(provinceOption)
}
})(proviceJson)
/**
* 根据省份获取城市
*/
function getCity(obj) {
// 1.激活城市下拉框
var citySel = obj.nextElementSibling || obj.nextSibling
citySel.disabled = ""
// 2.清空城市下拉框上次缓存内容（查询结果）
citySel.innerHTML = ""
var cityOpt = document.createElement("option")
cityOpt.innerText = "--请选择--"
citySel.appendChild(cityOpt)
// 3.清空区县乡下拉框上次缓存内容（查询结果）
var districtSel = obj.nextElementSibling.nextElementSibling || obj.nextSibling.nextSibling
districtSel.innerHTML = ""
var cityOpt = document.createElement("option")
cityOpt.innerText = "--请选择--"
districtSel.appendChild(cityOpt)
// 4.获取所选省份下拉框value属性值
var val = obj.value
// 5.获取省份下的城市数组
var cityArr = proviceJson[val].city
for (var i = 0 i < cityArr.length i++) {
var cityOption = document.createElement("option")
var citySelect = document.getElementById("city")
cityOption.innerText = cityArr[i].name
cityOption.value = i //循环变量i作为option的value属性值
citySelect.appendChild(cityOption)
}
}
/**
* 根据城市获取区县乡
*/
function getDistrict(obj) {
// 1.激活区县乡下拉框
var districtSel = obj.nextElementSibling || obj.nextSibling
districtSel.disabled = ""
// 2.获取所选省份value属性
var proVal = (obj.previousElementSibling || obj.previousSibling).value
// 3.获取所选择城市下拉框value属性值
var cityVal = obj.value
// 4.获取省份下的城市数组
var districtArr = proviceJson[proVal].city[cityVal].districtAndCounty
for (var i = 0 i < districtArr.length i++) {
var districtOption = document.createElement("option")
var districtSelect = document.getElementById("district")
districtOption.innerText = districtArr[i]
districtOption.value = i//循环变量i作为option的value属性值
districtSelect.appendChild(districtOption)
}
}
</script>
</body>
</html>
data.js（模拟数据）
var proviceJson = [{name: "北京市",
city: [{
name: "北京市",
districtAndCounty: ["东城区", "西城区", "崇文区", "宣武区", "朝阳区", "丰台区", "石景山区", "海淀区", "门头沟区", "房山区", "通州区", "顺义区", "昌平区", "大兴区", "怀柔区", "平谷区", "密云县", "延庆县", "延庆镇"]
}]
}, {
name: "重庆市",
city: [{
name: "重庆市",
districtAndCounty: ["渝中区", "大渡口区", "江北区", "沙坪坝区", "九龙坡区", "南岸区", "北碚区", "万盛区", "双桥区", "渝北区", "巴南区", "万州区", "涪陵区", "黔江区", "长寿区", "合川市", "永川区市", "江津市", "南川市", "綦江县", "潼南县", "铜梁县", "大足县", "荣昌县", "璧山县", "垫江县", "武隆县", "丰都县", "城口县", "梁平县", "开县", "巫溪县", "巫山县", "奉节县", "云阳县", "忠县", "石柱土家族自治县", "彭水苗族土家族自治县", "酉阳土家族苗族自治县", "秀山土家族苗族自治县"]
}]
}, {
name: "河北省",
city: [{
name: "石家庄市",
districtAndCounty: ["长安区", "桥东区", "桥西区", "新华区", "裕华区", "井陉矿区", "辛集市", "藁城市", "晋州市", "新乐市", "鹿泉市", "井陉县", "微水镇", "正定县", "正定镇", "栾城县", "栾城镇", "行唐县", "龙州镇", "灵寿县", "灵寿镇", "高邑县", "高邑镇", "深泽县", "深泽镇", "赞皇县", "赞皇镇", "无极县", "无极镇", "平山县", "平山镇", "元氏县", "槐阳镇", "赵县", "赵州镇"]
}, {
name: "张家口市",
districtAndCounty: ["桥西区", "桥东区", "宣化区", "下花园区", "宣化县", "张家口市宣化区", "张北县", "张北镇", "康保县", "康保镇", "沽源县", "平定堡镇", "尚义县", "南壕堑镇", "蔚县", "蔚州镇", "阳原县", "西城镇", "怀安县", "柴沟堡镇", "万全县", "孔家庄镇", "怀来县", "沙城镇", "涿鹿县", "涿鹿镇", "赤城县", "赤城镇", "崇礼县", "西湾子镇"]
}, {
name: "承德市",
districtAndCounty: ["双桥区", "双滦区", "鹰手营子矿区", "承德县", "下板城镇", "兴隆县", "兴隆镇", "平泉县", "平泉镇", "滦平县", "滦平镇", "隆化县", "隆化镇", "丰宁满族自治县", "大阁镇", "宽城满族自治县", "宽城镇", "围场满族蒙古族自治县", "围场镇"]
}, {
name: "秦皇岛市",
districtAndCounty: ["海港区", "山海关区", "北戴河区", "昌黎县", "昌黎镇", "抚宁县", "抚宁镇", "卢龙县", "卢龙镇", "青龙满族自治县", "青龙镇"]
}]
}]
这种东西关键就是函数名和参数什么的最好别重名给你个长的，自己照着改改吧，就是那么个意思源代码复制到一个网页就可以
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function Dyyfff()
{
this.Items = {}
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Dyyfff.prototype.add = function(id,iArray)
{
this.Items[id] = iArray
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Dyyfff.prototype.Exists = function(id)
{
if(typeof(this.Items[id]) == "undefined") return false
return true
}
function changfffe(vfff){
var strfff="0"
for(ifff=0ifff<vfffifff++){ strfff+=("_"+(document.getElementById(sfff[ifff]).selectedIndex-1))}
var ssfff=document.getElementById(sfff[vfff])
with(ssfff){
length = 0
options[0]=new Option(opt0[vfff],opt0[vfff])
if(vfff &&document.getElementById(sfff[vfff-1]).selectedIndex>0 || !vfff)
{
if(Dyyfff.Exists(strfff)){
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if(vfff)options[1].selected = true
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if(++vfff<sfff.length){changfffe(vfff)}
}
}
var Dyyfff = new Dyyfff()
Dyyfff.add("0",["计算机/互联网/通讯类","市场/公关/广告类","教师类","服务类","文字/艺术/设计类","高级管理类"," 销售类","行政/人事/后勤类","物流/贸易/采购类","建筑/房地产类","翻译类","生产/营运/工程类","财务/审计/统计/金融类","医疗/护理类","咨询/顾问类","律师/法务类" ])
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Dyyfff.add("0_2",["教师","教学/教务管理人员","助教","讲师","家教"])
Dyyfff.add("0_3",["美容/健身顾问","餐饮/娱乐经理","宾馆/酒店经理","领班","服务员","营业员/收银员/理货员","厨师","导游","司机","保安","寻呼员/话务员"])
Dyyfff.add("0_4",["编辑/作家/撰稿人","记者","校对/录入","排版设计","艺术/设计总监","影视策划/制作人员","导演","摄影师","音效师","演员/模特/主持人","平面设计/美术设计","纺织/服装设计","工业/产品设计","工艺品/珠宝设计"])
Dyyfff.add("0_5",["首席执行官/总经理","副总经理","总监","合伙人","总裁/总经理助理"])
Dyyfff.add("0_6",["销售总监","销售经理","区域销售经理","客户经理","渠道/分销经理","渠道主管","销售主管","销售代表","销售工程师","医药代表","保险代理","销售助理","商务经理","商务专员/助理","销售行政经理","销售行政主管","售前/售后技术服务经理","售前/售后技术服务主管","售前/售后技术服务工程师","售后/客户服务(非技术)经理","售后/客户服务(非技术)主管","售后/客户服务（非技术）专员","经销商"])
Dyyfff.add("0_7",["行政/人事总监","人事经理","人事主管","人事专员","人事助理","招聘经理/主管","薪资福利经理/主管","薪资福利专员/助理","培训经理/主管","培训专员/助理","行政经理/主管/办公室主任","行政专员/助理","经理助理/秘书","前台接待/总机","后勤","资料管理员","电脑操作员/打字员"])
Dyyfff.add("0_8",["物流经理","物流主管","物流专员/助理","物料经理","物料主管","采购经理","采购主管","采购员","外贸/贸易经理/主管","外贸/贸易专员/助理","业务跟单经理","高级业务跟单", "业务跟单","助理业务跟单","仓库经理/主管","仓库管理员","运输经理/主管","报关员","单证员","船务人员","快递员","理货员"])
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"医生(中\西医","医学管理人员","医药技术人员","药库主任/药剂师 ","护士/护理人员","临床协调员","临床研究员","麻醉师","心理医生","医药学检验"])
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</SCRIPT>
<SCRIPT LANGUAGE = JavaScript>
var sfff=["sfff1","sfff2"]
var opt0 = ["职位类别不限","不限"]
function setupfff()
{
for(ifff=0ifff<sfff.length-1ifff++)
document.getElementById(sfff[ifff]).onchange=new Function("changfffe("+(ifff+1)+")")
changfffe(0)
}
//##联动菜单结束-->
</SCRIPT>
<!--又是可恶的二级联动-->
<!---------------------------------------->
<SCRIPT LANGUAGE="JavaScript">
<!-- ###中国省市二级联动菜单开始##如有问题请到http://hi.baidu.com/51site找我!##
function Dyyeee()
{
this.Items = {}
}
Dyyeee.prototype.add = function(id,iArray)
{
this.Items[id] = iArray
}
Dyyeee.prototype.Exists = function(id)
{
if(typeof(this.Items[id]) == "undefined") return false
return true
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function changeeee(veee){
var streee="0"
for(ieee=0ieee<veeeieee++){ streee+=("_"+(document.getElementById(seee[ieee]).selectedIndex-1))}
var sseee=document.getElementById(seee[veee])
with(sseee){
length = 0
options[0]=new Option(opt0[veee],opt0[veee])
if(veee &&document.getElementById(seee[veee-1]).selectedIndex>0 || !veee)
{
if(Dyyeee.Exists(streee)){
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if(++veee<seee.length){changeeee(veee)}
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var Dyyeee = new Dyyeee()
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Dyyeee.add("0_7",["哈尔滨市","七台河市","黑河市","大庆市","齐齐哈尔市","伊春市","佳木斯市","双鸭山市","鸡西市","大兴安岭地区(加格达奇)","牡丹江","鹤岗市","绥化市 ","其他"])
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Dyyeee.add("0_10",["杭州市","湖州市","嘉兴市","舟山市","宁波市","绍兴市","衢州市","金华市","台州市","温州市","丽水市","其他"])
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Dyyeee.add("0_19",["南宁市","桂林市","柳州市","梧州市","贵港市","玉林市","钦州市","北海市","防城港市","崇左市","百色市","河池市","来宾市","贺州市","其他"])
Dyyeee.add("0_20",["海口市","三亚市","其他"])
Dyyeee.add("0_21",["渝中区","大渡口区","江北区","沙坪坝区","九龙坡区","南岸区","北碚区","万盛区","双桥区","渝北区","巴南区","万州区","涪陵区","黔江区","长寿区","合川市","永川市","江津市","南川市","綦江县","潼南县","铜梁县","大足县","璧山县","垫江县","武隆县","丰都县","城口县","开县","巫溪县","巫山县","奉节县","云阳县","忠县","石柱土家族自治县","彭水苗族土家族自治县","酉阳土家族苗族自治县","秀山土家族苗族自治县","其他"])
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Dyyeee.add("0_23",["贵阳市","六盘水市","遵义市","安顺市","毕节地区","铜仁地区","黔东南苗族侗族自治州","黔南布依族苗族自治州","黔西南布依族苗族自治州","其他"])
Dyyeee.add("0_24",["昆明市","曲靖市","玉溪市","保山市","昭通市","丽江市","普洱市","临沧市","宁德市","德宏傣族景颇族自治州","怒江僳僳族自治州","楚雄彝族自治州","红河哈尼族彝族自治州","文山壮族苗族自治州","大理白族自治州","迪庆藏族自治州","西双版纳傣族自治州","其他"])
Dyyeee.add("0_25",["拉萨市","那曲地区","昌都地区","林芝地区","山南地区","日喀则地区","阿里地区","其他"])
Dyyeee.add("0_26",["西安市","延安市","铜川市","渭南市","咸阳市","宝鸡市","汉中市","安康市","商洛市","其他"])
Dyyeee.add("0_27",["兰州市 ","嘉峪关市","金昌市","白银市","天水市","武威市","酒泉市","张掖市","庆阳市","平凉市","定西市","陇南市","临夏回族自治州","甘南藏族自治州","其他"])
Dyyeee.add("0_28",["西宁市","海东地区","海北藏族自治州","黄南藏族自治州","玉树藏族自治州","海南藏族自治州","果洛藏族自治州","海西蒙古族藏族自治州","其他"])
Dyyeee.add("0_29",["银川市","石嘴山市","吴忠市","固原市","中卫市","其他"])
Dyyeee.add("0_30",["乌鲁木齐市","克拉玛依市","喀什地区","阿克苏地区","和田地区","吐鲁番地区","哈密地区","塔城地区","阿勒泰地区","克孜勒苏柯尔克孜自治州","博尔塔拉蒙古自治州","昌吉回族自治州 伊犁哈萨克自治州","巴音郭楞蒙古自治州","河子市","阿拉尔市","五家渠市","图木舒克市","其他"])
Dyyeee.add("0_31",["香港","其他"])
Dyyeee.add("0_31",["澳门","其他"])
Dyyeee.add("0_32",["台湾","其他"])
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