四屏上下滚动带标题焦点图代码

代码说明：

  四屏上下滚动带标题焦点图代码样式美观，过度平滑，唯一不足的是使用table做的。(The four-screen scroll-up and scroll-down header focus diagram code is beautiful and overly smooth, the only drawback is that it is done with a table.)