button.popUpButton {
  margin-left: 3px;
  width: 17px;
  height: 16px;
  font-size: 0; }
  button.popUpButton.info-tall {
    background-image: url(icon_info_tall.gif);
    width: 19px;
    height: 18px; }
  button.popUpButton.info {
    background-image: url(icon_info.gif); }
  button.popUpButton.help {
    background-image: url(icon_help.gif); }
  button.popUpButton:hover {
    cursor: pointer; }