<div id="all">
<select id="save"></select>
<select id="city"></select>
<select id="area"></select>
</div>
<style>
select{
width: 100px;
}
div{
width: 500px;
height: 300px;
margin:150px auto;
}
</style>
<script type="text/javascript">
var arr=new Array();
var arr1=new Array("北京市","上海市","安徽省","江苏省","江浙省","山东省");
var arr2 = new Array();
arr[0]="东城,西城,崇文,宣武,朝阳,丰台,石景山,海淀,门头沟,房山,通州,顺义,昌平,大兴,平谷,怀柔,密云,延庆";
arr[1]="黄浦,卢湾,徐汇,长宁,静安,普陀,闸北,虹口,杨浦,闵行,宝山,嘉定,浦东,金山,松江,青浦,南汇,奉贤,崇明";
arr[2]="合肥,芜湖,蚌埠,马鞍山,淮北,铜陵,安庆,黄山,滁州,宿州,池州,淮南,巢湖,阜阳,六安,宣城,亳州";
arr[3]="南京市,苏州市,徐州,扬州,镇江";
arr[4]="杭州市,宁波市,金华,温州";
arr[5]="济南,日照,青岛,烟台";
var arr3=new Array();
arr3[0]=new Array();
arr3[0][0]="东城";
arr3[0][1]="西城";
arr3[0][2]="崇文";
arr3[0][3]="崇文";
arr3[1]=new Array();
arr3[1][0]="黄浦";
arr3[1][1]="卢湾";
arr3[2]=new Array();
arr3[2][0]="蜀山区,高新区,政务区,瑶海区,包河区";
arr3[2][1]="芜湖,镜湖区,无为";
$(function(){
first();
$("#save").change(function(){
second();
})
$("#city").change(function(){
third();
});
});
function first(){
var ff ="";
for(var i=0; i<arr1.length; i++){
ff = ff +'<option value="'+i+'">'+arr1[i]+'</option>';
}
$("#save").append(ff);
second();
}
function second(){
$("#city").empty();
var n=$("#save").val();
var Arr2=arr[n].split(',');
var se = "";
for(var i=0; i<Arr2.length; i++){
se = se+'<option value="'+i+'">'+Arr2[i]+'</option>';
}
$("#city").append(se);
third();
}
function third(){
$("#area").empty();
var c = $("#city").val();
var n=$("#save").val();
var Arr3=arr3[n][c].split(',');
var th = "";
for(var i=0; i<Arr3.length; i++){
th = th+'<option value="'+i+'">'+Arr3[i]+'</option>'
}
$("#area").append(th);
}
</script>