title: Simple jsfiddle example not working
body: <p>I know that a lot of question are asked like this, but I don't know what to write either than that. This is my fiddle: <a href="http://jsfiddle.net/CnJF5/2/" rel="nofollow">http://jsfiddle.net/CnJF5/2/</a></p>
  
  <p>HTML: <code>&lt;div id="myDiv" &gt;&lt;/div&gt;</code>  </p>
  
  <p>CSS:</p>
  
  <pre><code>#myDiv
  {
      background-color:black;
      width:100%;
      height:100%;
  }
  </code></pre>
  
  <p>How can this fiddle make a <code>div</code> that is over the hole page and is black?</p>