.loading {
    display: inline-block;
    /* from http://preloaders.net/en/circular */
    background: url(../img/loading-53cf8adae56c40414aec035cc588a4cf.gif) no-repeat;
    height: 64px;
    width: 64px;
}

.btn-lg .loading {
    /* from http://preloaders.net/en/circular */
    /* This loader uses the btn-primary color as its background to prevent transparent pixel bleedthrough */
    background-image: url(../img/loading_btn_primary_lg-ae3728be7fcaff6fe9c16b58582c7841.gif);
    height: 20px;
    width: 20px;
    text-align: left;
}

.show-loading {
    display: none;
    visibility: visible;
}