Show case sibling and descendant selectors for the question at http://stackoverflow.com/questions/6189064/what-is-the-simplest-way-to-implement-pure-css-show-hide
<div>
<h2>Sibling Tests</h2>
<a class="toggleid">show the one with id (#4)</a>
<br />
<a class="toggleall">show all (#1,#2,#3,#4)</a>
<div class="content">this is the content #1</div>
<br />
<a class="toggle-next">show next (#2)</a>
<div class="content">this is the content #2</div>
<br />
<a class="toggle-next">show next (#3)</a>
<div class="content">this is the content #3</div>
<div class="content" id="withid">this is the content #4 (<strong>with id</strong>)
</div>
<div class="nesting">
<h2> nesting Tests </h2>
<div class="nest-next">immediate children only
<div class="nest-all">all descendants
<div> depth 3
<div> depth 4
<div> depth 5
</div>
</div>
</div>
</div>
</div>
</div>