The viewer is free to use in personal or commercial web pages, provided that the script is not sold or exchanged for profit. An f the slideshow, suitable also for resale, may be purchased for a one-time per-site license fee.

Slideshow Viewer API

The interface to the slideshow is simple - just insert the script source, initialize the viewer and photo links, and call the method. Here is an example:
<script type="text/javascript"
<script type="text/javascript">
  var viewer = new PhotoViewer();
<a href="javascript:void(">Slideshow</a>