Wordpress: Highlight active menu item
<p>I am working on this <a href="http://ziegler-p.nowcommu.myhostpoint.ch/" rel="nofollow">website</a>  and i am trying to highlight with a <code>border-bottom</code> the active menu link. As you can see is a one scroll website but i can't highlight it via CSS. I want to highlight the MÖGLICHKEITEN - GALERIE - KONTAKT links when they are active.
I tried this:</p>

<p>CSS:</p>

<pre><code>#dslc-module-84 .dslc-navigation .menu &gt; li &gt; a:active { border-bottom: 1px solid #3da22b !important; }
</code></pre>

<p>Any ideas?</p>

<p>EDIT:</p>

<p><a href="http://i.stack.imgur.com/vCh7H.png" rel="nofollow">KONTAKT</a></p>