/* tables */
table.tablesorter thead .tablesorter-header {
    /* background-image: url(bg.png); */
    background-repeat: no-repeat;
    background-position: 0% 80%;
    cursor: pointer;
}
table.tablesorter thead th.tablesorter-headerAsc  { background-image: url(asc.png); }
table.tablesorter thead th.tablesorter-headerDesc { background-image: url(desc.png); }