wiki.techinc.nl/resources/jquery/jquery.tablesorter.css

/* Table Sorting */
table.jquery-tablesorter th.headerSort {
	/* @embed */
	background-image: url(images/sort_both.gif);
	cursor: pointer;
	background-repeat: no-repeat;
	background-position: center right;
	padding-right: 21px;
}
table.jquery-tablesorter th.headerSortUp {
	/* @embed */
	background-image: url(images/sort_up.gif);
}
table.jquery-tablesorter th.headerSortDown {
	/* @embed */
	background-image: url(images/sort_down.gif);
}