省份option的value写为省份的标示，就是省份和城市关联的字段
<script>
$(function(){
$('#dorp1').change(function(){
var province = $(this).val()
$.get("/控制器名/请求的方法名", {'id':province}, function(ret){
// ret是请求方法的返回值，在这里就是通过省份查到的城市数组
var city = ''
$.each(ret, function(i, o){
city += "<option value=" + o.城市id + ">" + o.城市名 + "<option>"
})
$("#dorp2").empty().append(city)
})
})
})
</script>
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> 
<select name="shi">
<option>请选择城市/地区</option>
</select>
希望能帮到你 谢谢
