CSS Shadow

How would I go about using CSS shadows in the thumbnail page as seen in this example?
http://web-graphics.com/mtarchive/vsds.html

Create custom templates that does the same output that’s done in that page. eg, add class="shadow" style="padding:0 4px 4px 0" to the div in gallerypicturetpl and style="top:-2px;left:-2px" to the img tag and then add the necessary css to your site template or maxigallery css file/chunk.