background-color: transparent;
background-color: rgba(0, 0, 0, 0.4); /* FF3+, Saf3+, Opera 10.10+, Chrome, IE9 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#66000000,endColorstr=#66000000); /* IE6\96IE9 */
background-color: transparent;
background-color: rgba(0, 0, 0, 0.4); /* FF3+, Saf3+, Opera 10.10+, Chrome, IE9 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#66000000,endColorstr=#66000000); /* IE6\96IE9 */