In a nutshell, this is what I used to achieve somewhat cross browser css background transparency: #content { background-color: rgba(255,255,255,0.3); } Then, you’ll of course need to make an exception for stinkin IE: <!–[if IE]> <style type="text/css"> #content { background:transparent; filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#44FFFFFF,endColorstr=#44FFFFFF); zoom: 1; } </style> <![endif]–> In the case above, I’m using Microsoft’s gradient, but [...]