#loader {
    display: none;
    width: 100px;
    height: 100px;
    position: fixed;
    top: 50%;
    left: 50%;
    background: url(../images/nuclear_spinner.gif) no-repeat center #e0e0e0;
    text-align: center;
    padding: 10px;
    font: normal 16px Tahoma, Geneva, sans-serif;
    border: none;
    border-radius: 12px;
    margin-left: -50px;
    margin-top: -50px;
    z-index: 5000;
    overflow: auto;
}