table.tablesorter thead tr .header {
	background-image: url('bg.gif');
	background-repeat: no-repeat;
	background-position: center right;
	padding-right: 20px;
	cursor: pointer;
}

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

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