the whole page too; it starts with:

  <body style="overflow: scroll;">
    <div style="overflow: scroll;">
      <div style="overflow: scroll;">
        <div style="overflow: scroll;">

Indeed. I just set scrollbars to always show on my Macbook per the author's suggestion and there are 4 scrollbars on their page!

Makes me wonder if I'm missing the point of the fairly simple post?