eight: height},
                    yAxis: {name: 'axisPointer: not show by default'}
                });
                baseTop += height + gap;
                makeCategoryGrid(option, {
                    grid: {top: baseTop, height: height},
                    xAxis: {axisPointer: {show: true}},
                    yAxis: {name: 'axisPointer: show if specified'}
                });
                baseTop += height + gap;

                var dom = document.getElementById('no-tooltip');
             