#preloader {
    position:absolute;
    top:0;
    left:0;
    right:0;
    bottom:0;
    opacity:0.7;
    background-color:#FFFFFF; /* change if the mask should have another color then white */
    z-index:99; /* makes sure it stays on top */
}

#status {
    width:60px;
    height:60px;
    position:absolute;
    left:50%; /* centers the loading animation horizontally one the screen */
    top:50%; /* centers the loading animation vertically one the screen */
    background-repeat:no-repeat;
    background-position:center;
    margin:-30px 0 0 -30px; /* is width and height divided by two */
    text-align:center;
}

#status img { margin:0px 0px 5px 0px; }