#gallery img {
  float: left;
}

.buttonAddComment a {
  display: block;
  width: 147px;
  height: 15px;
  background: url('addcomment.gif') no-repeat;
}
.buttonAddComment a:hover { background-position: -147px 0; }

.buttonViewComments a {
  display: block;
  width: 119px;
  height: 15px;
  background: url('viewcomments.gif') no-repeat;
}
.buttonViewComments a:hover { background-position: -119px 0; }