table.tablesorter thead tr th { 
    background-image: url(images/bg.gif); 
    cursor: pointer; 
    background-repeat: no-repeat; 
    background-position: right center;
}

table.tablesorter thead tr th{    border: 1px solid #dad9c7; }

table.tablesorter thead tr th.tablesorter-headerAsc { 
    background-image: url(images/asc.gif); 
}

table.tablesorter thead tr th.tablesorter-headerDesc { 
    background-image: url(images/desc.gif);
}

table.tablesorter thead tr .sortless{background-image:none; cursor: default;}