is_loading class overlay before after

.is_loading{
  min-height: 200px;
}



.is_loading:after{
    /* min-height: 220px; */
    z-index: 1;
    content: "";
    width: 100%;
    height: 100%;
    background: #ffffff;
    top: 0;
    right: 0;
    position: absolute;
    display: inline-block;
}

.is_loading:before{
    z-index: 2;
    content: "";
    width: 100%;
    height: 100%;
    background:
     url("/images/loading.gif")    /* image */
     center 10% / 100px 100px /* position / size */
     no-repeat;
    /* top: 0; */
    /* right: 0; */
    position: absolute;
    display: inline-block;
}