Enqueue Thickbox

<?php

//Enqueue thickbox - for plugin file
wp_enqueue_style('thickbox');
wp_enqueue_script('thickbox');

//Thickbox example - for display
<a href="images/single.jpg" title="add a caption to title attribute / or leave blank" class="thickbox"><img src="images/single_t.jpg" alt="Single Image"/></a>
?>