Or how to animate PNGs
fixes background position problem in IE6
IE7 is a JavaScript library to make Microsoft Internet Explorer behave like a standards-compliant browser. It fixes many HTML and CSS issues and makes transparent PNG work correctly under IE5 and IE6.
This plugin will fix the missing PNG-Transparency in Windows Internet Explorer 5.5 & 6.
PNG transparency workaround for IE 5.5 and IE 6