Vivian Crap

          				.classname {
          					opacity: 0.5; /* For Newer Mozilla Browsers, Safari, and Opera */
          					-moz-opacity: 0.5 /* For Older Mozilla Browsers, like Netscape Navigator */
          					-khtml-opacity: 0.5; /* For Older Safari */
          					-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(opacity=50)"; /* For IE 8 */
          					filter: alpha(opacity=50); /* For IE 6 and IE 7 */
          				}
          			

          				var setOpacity = function(element, value) {
          					element.style.opacity = value / 100; /* For Newer Mozilla Browsers, Safari, and Opera */
          					element.style.MozOpacity = value / 100; /* For Older Mozilla Browsers, like Netscape Navigator */
          					element.style.KhtmlOpacity = value / 100; /* For Older Safari */
          					element.style.MsFilter = '"progid:DXImageTransform.Microsoft.Alpha(opacity=' + value + ')"'; /* For IE8 */
          					element.style.filter = "alpha(opacity=" + value + ")"; /* For IE 6 and IE7 */
          				};