layui table 表格上下左右事件

//按键监听事件
        $(document).on('keydown', '.layui-input',
        function(event) {
            var td = $(this).parent('td');
            var index = td.index();
            var tr = td.parent('tr');
            var key = event.keyCode;
            switch (key) {
                case 38://上键ArrowUp
                    tr['prev']().children('td').eq(index).click();
                    setTimeout(function(){
                        $('.layui-table-edit').select(),0
                    });
                    break;
                case 40://下键ArrowDown
                    tr['next']().children('td').eq(index).click();
                    setTimeout(function(){
                        $('.layui-table-edit').select(),0
                    });
                    break;
                case 9://TAB
                    tr['next']().children('td').eq(index).click();
                    setTimeout(function(){
                        $('.layui-table-edit').select(),0
                    });
                    break;
                case 13://回车
                    tr['next']().children('td').eq(index).click();
                    setTimeout(function(){
                        $('.layui-table-edit').select(),0
                    });
                    break;
                case 37://左键ArrowLeft
                    td['prevAll']('[data-edit="text"]:first').click();
                    break;
                case 39://右键ArrowRight
                    td['nextAll']('[data-edit="text"]:first').click();
                    break;
            }
        });