layui的select下拉框，动态获取数据，ajax应该放在我的layui哪里

                                        <select id="zc_state_id" name="zc_state_id" lay-verify="required" lay-search=""></select>

如果动态获取数据

 $.ajax({
                    type:"post",
                    url:'zd/csleibie',
                    dataType:"json",
                    async:false,
                    success:function (data) {
                        $("zc_state_id").append(new Option("全部",""));
                        $.each(data,function (index,state) {
                            $("zc_state_id").append(state.leibie_name,state.zd_leibie_id)
                        })
                        form.render();
                    }

 layui.use(['form', 'table'], function () {
        var $ = layui.jquery,
            form = layui.form,
            layer=layui.layer,
            table = layui.table;//获取当前页面所有的table
        var exportData; //后台原始数据
        var title = []; //excel头部title
        var importData = []; //导出excel数据
        var abc = [
            {field: 'zdid', title: '工单编号', style:'width:10%',},
          
        ];




        //渲染表格
        var ins1= table.render({
            elem: '#demo',//指定table的id
            url: '/zd/ceshicha',
            done:function(res, curr ,count){
                exportData=res.data;
                $('th').css(({ 'text-align':'center','background-color': '#bdccea', 'color': 'black', 'font-weight': '500' }))
                $('layui-table-total.layui-table tbody tr').css({ 'color': 'red' });
                $('.layui-table-total.layui-table tbody tr').css({ 'background-color': '#ffffb4' });
                var that = this.elem.next(); res.data.forEach(function (item, index) {
                    //console.log(item.empName);item表示每列显示的数据
                    if (index % 2 == 0) {
                        var tr = that.find(".layui-table-box tbody tr[data-index='" + index + "']")
                            .css(({'border-top':'1px solid black','border-bottom':'dashed','border-left':'1px','text-align':'center'}));
                    } else {
                        var tr = that.find(".layui-table-box tbody tr[data-index='" + index + "']")
                            .css(({'border-top':'1px solid red','border-bottom':'dashed','text-align':'center'}));
                    }
                });
                //遍历excel表格头部
                $.each(abc,function (index,item) {
                    title.push(item.title);
                });
                //遍历excel表格数据
                $.each(exportData,function (index,item) {
                    var row_arr = [];
                    $.each(abc,function (i,row) {
                        if(row.field=="zd_state"){
                            row_arr.push( item.zd_state.access_network);
                        }else{
                            row_arr.push(item[row.field]);
                        }
                    });
                    importData.push(row_arr);
                });
            },



            defaultToolbar: ['filter', 'exports', 'print', {
                title: '提示',
                layEvent: 'LAYTABLE_TIPS',
                icon: 'layui-icon-tips'
            }],
            method: "post",
            cols: [abc],
            limits: [10, 15, 20, 25, 50, 100],
            limit: 15,
            page: true,
            skin: 'line'
        });
        //导出excel
        $("#export").click(function(){
            table.exportFile(title, importData,'xls');
        });


        //点击监听
        table.on('row(demo)', function (obj) {
            //获取的zdid
            //跳转的时候如何拿到获取的值
            layer.open({
                type:2,
                shadeClose: true,
                shade: false,
                maxmin:true,
                area:['100%','100%'],
                content: 'http://localhost:8887/zd/xiangxi/'+obj.data.zdid

            });

        })

        // 监听搜索操作
        form.on('submit(data-search-btn)', function (data) {
            //执行搜索重载
            table.reload('demo', {
                page: {
                    curr: 1
                },
                where: data.field
            }, 'data');

            return false;
        });



        table.on('tool(currentTableFilter)', function (obj) {
            var data = obj.data;
            if (obj.event === 'exit') {
                layer.open({
                    type: 2
                    ,title: false //不显示标题栏
                    ,closeBtn: false
                    ,area: ['900px','600px']
                    ,shade: 0.8
                    ,id: 'LAY_layuipro' //设定一个id，防止重复弹出
                    ,btn: ['取消']
                    ,btnAlign: 'c'
                    ,moveType: 1 //拖拽模式，0或者1
                    ,content: '/letter/toLetterList?lNumber='+data.lNumber
                    ,success: function(layero,index){
                    }
                });
            }

        });

    });