A power full alternative to load pictures and descriptions about the photo is a Popeye, a jQuery plug-in. Popeye work inline floating across the content. The XHTML code is simple and W3 valid.

To load this plug-in you may before load too jQuery after include too Popeye Javascript file, and to run it use the code bellow into HEAD tag:

$(document).ready(function () {
	$('.popeye').popeye();
});

Take a look in DEMO page and in Download page, two links bellow:

Demo page
Download page