A Pen by Devin Schulz.

index.html

<dl class="accordion">
  <dt><a href="#">heading</a></dt>
  <dd>Hidden Content</dd>
  
  <dt><a href="#">heading</a></dt>
  <dd>Hidden Content</dd>
  
  <dt><a href="#">heading</a></dt>
  <dd>Hidden Content</dd>
</dl>

script.coffee

(($) ->
  panel = $(".accordion > dd").hide()
  $(".accordion > dt > a").click (event) ->
    event.preventDefault();
    if $(@).parent().next('dd').is(':visible') then panel.slideUp()
    else
      panel.slideUp()
      $(this).parent().next().slideDown()
      false
) jQuery