title: clickable css menu without JS
body: <p>i want to create an HTML5 menu with CSS which works with click instead of hover.
  I saw examples on the web where its done with JS.
  I was wondering if it's possible to do it without JS. one way maybe is to add </p>
  
  <pre><code> &lt;input type='checkbox' /&gt; 
  </code></pre>
  
  <p>before each parent and according to if its checked to show the sub items
  what do you think?</p>