As a CSS novice, I am curious to find out how to maintain the underline effect on links (as seen in this demo) without it disappearing when the mouse focus is removed. While I am aware that jQuery or javascript can be used to keep the focus on an element, I specifically want the underline to remain visible even after the cursor has moved away. Your help is greatly appreciated.
<section class="blue-green">
<nav id="cl-effect-4" class="cl-effect-4">
<a id="focus-this" href="index.html">+ Create New</a>
<a href="launch_approved.html">Launch Approved Campaigns</a>
<a href="pending.html">Pending Approval</a>
<a href="record.html">Your Campaign Record</a>
</nav>
</section>