.lightbox
{
  background: #FFF url('/images/loading.gif') no-repeat;
  background-position: 42px 42px;
  border: solid 2px #AAA;
  width: 100px;
  height: 100px;	
  z-index: 15000;
  overflow: hidden;
}

.lightbox img
{
  visibility: hidden;
}