.play {
    width: 48px;
    height: 38px;
    visibility: hidden;
    position: relative;
    border: none;
    top: 50%;
    left: 50%;
    margin-left: -24px;
    margin-top: -19px;

    filter:alpha(opacity=30);
    -moz-opacity: 0.3;
    -khtml-opacity: 0.3;
    opacity: 0.3;
}