<label>所在地点</label>
<select name="province_id" id="province_id" style="width:150px;">
<option>请选择</option>
<volist name="province_list" id="province">
<option value="{$province.region_id}">{$province.region_name}</option>
</volist>
</select>
<select name="city_id" id="city_id" style="width:150px;" >
<option>请选择</option>
<volist name="city_list" id="city">
<option value="{$city.region_id}" selected="selected">{$city.region_name}</option>
</volist>
</select>
<select name="district_id" id="district_id" style="width:150px;" >
<option value="0">请选择</option>
<volist name="dis_list" id="dis">
<option value="{$dis.region_id}" selected="selected">{$dis.region_name}</option>
</volist>
</select>
</div>

<script>
$("#province_id").change(function(){
var province_id=$(this).val();
$.ajax({
url:'/city/index.php/Home/Index/get_citys',
Type:"POST",
data:"province_id="+province_id,
dataType:"json",
success:function(data){
var city = data.city;
var option=$("<option></option>");
$(option).val("0");
$(option).html("请选择");
var option1=$("<option></option>");
$(option1).val("0");
$(option1).html("请选择");
$("#city_id").html(option);
$("#district_id").html(option1);
for(var i in city){
var option=$("<option></option>");
$(option).val(city[i]['region_id']);
$(option).html(city[i]['region_name']);
$("#city_id").append(option);
}
}

});

});
</script>
<script>
$("#city_id").change(function(){
var city_id=$(this).val();
$.ajax({
url:'/city/index.php/Home/Index/get_district',
Type:"POST",
data:"city_id="+city_id,
dataType:"json",
success:function(data){
var district = data.district;
var option=$("<option></option>");
$(option).val("0");
$(option).html("请选择");
$("#district_id").html(option);
for(var i in district){
var option=$("<option></option>");
$(option).val(district[i]['region_id']);
$(option).html(district[i]['region_name']);
$("#district_id").append(option);
}
}
});
});
</script>
复制代码

<?php
namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
//获取省和直辖市
public function index(){
$listObj = M('region');
$whereprovince['top_parentid'] = 0;
$listprovince = $listObj->where($whereprovince)->select();
$this->assign("province_list",$listprovince);

    $this->display();
}
//获取地级市
public function get_citys(){
    $listObj = M('region');
    $where['top_parentid'] = I('province_id');
    $where['level'] = 2;
    $list = $listObj->where($where)->select();
    $data=array('status'=>0,'city'=>$list);
    header("Content-type: application/json");
    exit(json_encode($data));
}
//获取地级县
public function get_district(){
    $listObj = M('region');
    $where['parent_id'] = I('city_id');
    $where['level'] = 3;
    $list = $listObj->where($where)->select();
    $data=array('status'=>0,'district'=>$list);
    header("Content-type: application/json");
    exit(json_encode($data));
}