table.tablesorter thead tr .header {
  background-image: url(../img/tablesorter/bg.gif);
  background-repeat: no-repeat;
  background-position: 0% 50%;
  cursor: pointer;
  padding-left: 18px;
}

table.tablesorter thead tr .sorter-false {
  padding-left: 8px;
  cursor: default;
  background: none;
}

table.tablesorter thead tr .headerSortUp {
  background-image: url(../img/tablesorter/asc.gif);
}

table.tablesorter thead tr .headerSortDown {
  background-image: url(../img/tablesorter/desc.gif);
}