Crossbrowser RGBA and Prevention of Opacity Propagation

Crossbrowser RGBA

/**
 * Crossbrowser RGBA and Prevention of Opacity Propagation
 * Created by Martin Ivanov
 * http://wemakesites.net
 */
 
.outer
{
    position: absolute;
    top: 24px;
    left: 24px;
    border: solid 1px #000;
    padding: 24px;
    background: rgba(64, 64, 64, 0.5); /* R, G, B, A */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#7f404040, endColorstr=#7f404040); /* AA, RR, GG, BB */
}