layui 三级联动

        //地区三级联动

        form.on('select(province)', function(data){

            getArea("province",data.value);

        });

        form.on('select(city)', function(data){

            getArea("city",data.value);

        });

        function getArea(type,id){

            $.ajax({

                url:"{:url('admin/Base/place')}",

                dataType:"json",

                data:'id='+id,

                type:'post',

                success:function(res){

                    var opt = null;

                    $.each(res.msg,function(key,vo){

                        opt = opt+"<option value="+vo.district_id+">"+vo.district+"</option>";

                    })

                    if(type=="province"){

                        $("#city").empty();

                        $("#city").append('<option value="">---- 请选择市 ----</option>');

                        $("#district").empty();

                        $("#district").append('<option value="">---- 请选择区 ----</option>');

                        $("#city").append(opt);

                    }else if(type == "city"){

                        $("#district").empty();

                        $("#district").append('<option value="">---- 请选择区 ----</option>');

                        $("#district").append(opt);

                    }

                    form.render('select');

                }

            })

        }