.box-remove:hover {
  opacity: 1;
  filter: alpha(opacity=100);
}
.box-remove {
  background: url('images/tagbox_icons.png') no-repeat -16px center;
  display: inline-block;
  width: 16px;
  height: 16px;
  opacity: 0.6;
  filter: alpha(opacity=60);
}