With 504 different combinations, this is the only CSS button script you’ll ever need! There are 18 different rich colors (with gradients), 4 different shapes (rectangle, rounded etc.), tooltip and icon implementation, and CSS animations. These buttons are compatible with many HTML tags, including button, input, a, span, h (h2, h3 etc.), and div. They are cross-browser compatible, and degrade gracefully with older browsers (such as IE6).