Can someone give an example when to let switch statements use multiple case statements?
<p>I'm reading <em>Javascript: the Definitive Reference</em>, and it says on page 93: </p>

<blockquote>
  <p>On rare occasions, it is useful to write code like this that falls
  through from one case label to the next, but 99% of the time you
  should be very careful to end every case within a switch with a break
  statement.</p>
</blockquote>

<p>In what situation would you let a switch statement fall through to multiple case statements?</p>
