#overlay {
                background-color: #F0F0F0;
                filter:alpha(opacity=50); /* IE */
                opacity: 0.5; /* Safari, Opera */
                -moz-opacity:0.50; /* FireFox */
                z-index: 20;
                background-repeat:no-repeat;
                background-position:center;
                width: 100%;
                height: 100%;
                position:absolute;
                top: 0px;
                left: 0px;

            }