.drop_file_area {
    display: none;
    z-index: 1000;
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    background-color: black;
    filter: alpha(opacity=40);
    -moz-opacity:0.40;
    opacity:0.40;
}
.drop_file_area_message {
    z-index: 999;
    position: fixed;
    color: orange;
    font-weight: bold;
    font-size: 200%;

    top: 50%;
    left: 50%;
    margin-top: -20px;
    margin-left: -250px;
}