title: Only show border when a div's height is greater than a certain amount
body: <p>Suppose I have a <code>div</code> with a max height of <code>350px</code>.</p>
  
  <p>Anything greater than this height and that <code>div</code> will <code>overflow</code> with a scroll bar.</p>
  
  <p>Now if I want a border to show whenever there isn't a scroll bar, how would I achieve that.</p>
  
  <p>Thanks.</p>