Code used:

<a href="/wp-content/connections-reloaded.jpg"
onclick="ald_OpenPictureWindow(this.href,'iimagebrowser',
'','800','600',true,'Connections Reloaded'); return false">
<img src="/wp-content/_connections-reloaded.jpg"
title="Connections Reloaded"
alt="Connections Reloaded"
width="250"
height="187"
class="thumbnail" /></a>

Copy pasting the above code can cause errors due to the way the text is rendered. Please use it as a starting point to write your own code.