.js-wtAjaxLoader {
    position: absolute;
    z-index: 10000;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    /*background: url(images/wt-loading.gif) center no-repeat;*/
    /*opacity: 0.4;*/
    /*filter: alpha(opacity=40);*/
}
.js-wtAjaxLoader:before{
    content: '';
    display: block;
    background: #999999;
    height: 100%;
    width: 100%;
    opacity: 0.4;
    filter: alpha(opacity=40);
}
.js-wtAjaxLoader:after{
    content: '';
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin-top:-15px;
    margin-left: -15px;
    background: url(images/wt-loading.svg) center no-repeat;
}
.js-wtAjaxLoader.hidden {
    display: none;
}