PNG for IE Fix
A JavaScript-based PNG fix for Internet Explorer 5.5 and 6 on Windows. The fix allows IE to properly render PNG alpha transparency. If you want to get straight to the script, go to the how-to page and follow the instructions there. If you have the time for a description and demo of the problem, then read on…
For information on a css filter without Javascript, check out this.

this doesnt address using .png as a transparent background. Check out this link for all your fixes. http://www.clikproductions.com/blog/2006/02/using-png-transparencies.html
Comment by Corey Kliewer — April 4, 2006 @ 10:25 pm