.se-pre-con {
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background-color: rgba(192,192,192,0.3);
    background: url('../../Content/images/loader.gif') center no-repeat;
}

.dataTable thead td,
.dataTable thead th {
    white-space: pre;
}