#middle_column
{
  position:relative;
}
#ajax_filters_loading {
  background:#FFFFFF url(../../images/productlistings-ajax.gif) no-repeat scroll 50% 15%;
  height:100%;
  left:0;
  opacity:0.7;
  position:absolute;
  top:0;
  width:100%;
  z-index:3000;
}