IE6’s lack of transparent PNG support is appalling, but Microsoft does offer a proprietary fix for the same problem: CSS behaviors, which are a non-standard extension to the CSS spec. By applying a special behavior to your PNG images, you can force IE6 to display them with their alpha transparency intact. Other (and probably sometimes much better) ways to fix MSIE PNG problem are to use CSS filters or jQuery.IE6’s lack of transparent PNG support is appalling, but Microsoft does offer a proprietary fix for the same problem: CSS behaviors, which are a non-standard extension to the CSS spec. By applying a special behavior to your PNG images, you can force IE6 to display them with their alpha transparency intact. Other (and probably sometimes much better) ways to fix MSIE PNG problem are to use CSS filters or jQuery.

From this tutorial you will learn about these 3 techniques which will help you resolving IE6 PNG Alpha Transparency issue on your (x)HTML pages.