.subtractiveSelections ul li a {
  background:   transparent url(/images/buttons/subtractiveCheck.gif) no-repeat scroll left top;
  display:      block;
  float:        right;
  font-weight:  normal;
  height:       19px;
  margin-left:  2px;
  text-indent:  -6000px;
  width:        16px;
}

.subtractiveSelections ul li a:active,
.subtractiveSelections ul li a.off {
  background-position:-16px top !important;
}