The CSS code also includes several CSS3 ... which sets the absolute position, border, background color, 5 pixel padding, and a box shadow for each image. The class is also called in the jQuery ...

The CSS 3 box-shadow property allows for drop shadows and other gradient-based effects without the need for images or other hacks. Box shadow works in Firefox 3+, Chrome, Safari, Opera and ...

With the CSS3 "box-shadow" property, you can add a customizable shadow to any box element without having to use images. The box-shadow property works in all major browsers that support CSS3.