//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
$("select[name=shi]").append("<option value='"+val+"'>"+val+"</option>")
})
})
<select name="sheng"></select> 
<select name="shi">
<option>请选择城市/地区</option>
</select>
希望能帮到你 谢谢
function enters() {var vkey=$("#shengfen").val()
var option = $("<option value=" + vkey + ">" + vkey + "</option>")
$("#province option").remove()
$("#province").append(option)
}
function enterc() {
var vkey=$("#chengshi").val()
var option = $("<option value=" + vkey + ">" + vkey + "</option>")
$("#city option").remove()
$("#city").append(option)
}
运行看一下效果
在三级地址这个元素上，绑定一二级的数据标记，根据这些标记把一二级也显示出来。比如 河北-》石家庄-》赵县。在赵县这个元素上绑定数据eg。data-xx=“60”data-x="9" 这里数据代办一二级的对应的数据标记，可以根据这个来确定一二级。
