.rotator {
  position:relative;
  float:left;
}
  .rotator .prev-nav,
  .rotator .next-nav {
    position:absolute;
    bottom:20px;
    width:17px;
    height:27px;
    cursor:pointer;
    background:url("/images/rotator-nav.png");
    display:block;
  }
    .rotator .prev-nav { 
      left:20px;
      background-position:left;
    }
    .rotator .next-nav {
      right:20px;
      background-position:right;
    }