DD_roundies is a javascript library authored by Drew Diller which offers a new approach to bringing rounded corners to Internet Explorer (a browser notorious for its CSS shortcomings). DD_roundies uses IE's proprietary VML drawing language to create small images representing each corner of an element to be rounded. The script is smart enough to figure out quite a lot about its environment, such as element dimensions, border appearance and even background image and color, and uses all of this information to draw and position each VML image to appear seamlessly integrated in an interface.
