body:after {
  content: url(../images/close.png) url(../images/loading.gif) url(../images/prev.png) url(../images/next.png);
  display: none;
}
.lb-cancel {
  background: url(../images/loading.gif) no-repeat;
}
.lb-nav a.lb-prev {

  background: url(../images/prev.png) left 48% no-repeat;

}

.lb-nav a.lb-next {

  background: url(../images/next.png) right 48% no-repeat;

}

.lb-data .lb-close {

  background: url(../images/close.png) top right no-repeat;

}