span.customcheck {
  display: inline-block;
  width: 13px;
  height: 14px;
  margin-right: 5px;
  background: transparent url('../../images/default/ui/checkboxes.jpg') no-repeat 0 0;
}

span.customcheckfull {
  background-position: 0 0;
}

span.customcheckfull:hover {
  background-position: -13px 0;
}

span.customchecknone {
  background-position: 0 -14px;
}

span.customchecknone:hover {
  background-position: -13px -14px;
}

span.customcheckpartial {
  background-position: 0 -28px;
}

span.customcheckpartial:hover {
  background-position: -13px -28px;
}