.artkover_win .toolbar .nav {
  position: relative;
}
.artkover_win .toolbar .nav button {
  position: absolute;
  width: 37px;
  height: 13px;
  padding: 0;
  background: none no-repeat scroll 0 0 transparent;
  border: 0 none;
  cursor: pointer;
  margin: 0;
  outline: 0 none;
  overflow: visible;
  top: 8px;
}
.artkover_win .toolbar .nav button.prev {
  left: 0;
  width: 71px;
  background-image: url(../images/left.gif);
}
.artkover_win .toolbar .nav button.next {
  right: 0;
  width: 65px;
  background-image: url(../images/right.gif);
}