title: how to size a div's height to its container height, using CSS?
body: <p>How to size a div's height to its container height, using CSS ?</p>
  
  <pre><code>&lt;div class='container'&gt;&lt;br&gt;
    &amp;nbsp;&amp;nbsp;&lt;div style='display: block; height: 500px'&gt;left&lt;/div&gt;&lt;br&gt;
    &amp;nbsp;&amp;nbsp;&lt;div id='to-be-sized' &gt;right&lt;/div&gt;&lt;br&gt;
  &lt;/div&gt;
  </code></pre>