title: Removing the underline from under a visited link
body: <p>What is the CSS code that I need to write in order to remove the underline from these link after visiting them?</p>
  
  <pre><code>&lt;ul id = "header"&gt;
      &lt;li&gt;&lt;a href="sigur ros.html"&gt; Home &lt;/a&gt; &lt;/li&gt;
      &lt;li&gt;Images&lt;/li&gt;
      &lt;li&gt;Videos&lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>I tried this: </p>
  
  <pre><code>a:visited { text-decoration: none; }
  </code></pre>
  
  <p>but it didn't work.</p>
  
  <p>Here is a fiddle showing the problem: <a href="http://jsfiddle.net/litari/X2Yjk/1/" rel="noreferrer">http://jsfiddle.net/litari/X2Yjk/1/</a></p>