CSS Decorative Gallery

WebDesignerWall show how to decorate your images and photo galleries without editing the source images. The trick is very simple. All you need is an extra <span> tag and apply a background image to create the overlaying effect. It is very easy and flexible — see my demos with over 20 styles, from a simple image icon to a rounded corner to a masked layer (both decorative and complex).

http://www.webdesignerwall.com/tutorials/css-decorative-gallery/