table.sorter thead tr  .order-asc {
    background-image: url(/images/sortasc.png) !important;
}

table.sorter thead tr .order-desc {
    background-image: url(/images/sortdesc.png) !important;
}

table.sorter thead tr th {
    background-repeat: no-repeat;
    background-position: center right;
    cursor: pointer;
	background-image: url(/images/sortfold.png) !important;
}