.previous_button {
  height: 32px;
  width: 175px;
  background: url(prototype-ui/vertical/left.png);
  cursor: pointer;  
  display:block;
  border : 0 none;  
  margin: 0 5px;
}

a:hover .previous_button {
  background: url(prototype-ui/vertical/left_over.png);
}

.carousel-disabled.previous_button {
  background: url(classic/vertical/left_disabled.png);
  cursor: default;
}

.next_button {
  height: 32px;
  width: 175px;
  background: url(classic/vertical/right.png);
  cursor: pointer;
  display:block;
  border : 0 none;
  margin: 0 5px;
}

a:hover .next_button {
  background: url(classic/vertical/right_over.png);
}

.carousel-disabled.next_button {
  background: url(classic/vertical/right_disabled.png);
  cursor: default;
}