LightningContainer.html

<div id='container'>
  <!-- all your normal page content goes in here -->
</div>

LightningHeader.html

<link href='lightningBox.min.css' media='screen' rel='stylesheet' type='text/css' />
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js' type='text/javascript'></script>
<script src='lightningBox.min.js' type='text/javascript'></script>

LightningLink.html

<a href='myImage.jpg' rel='lightning'> My image </a>