.tablesorter thead{cursor:pointer;}.headerSortDown:after,.headerSortUp:after{content:' ';position:relative;left:10px;border:7px solid transparent;}.headerSortDown:after{top:10px;border-top-color:silver;}.headerSortUp:after{bottom:15px;border-bottom-color:silver;}.headerSortDown,.headerSortUp{padding-left:20px;opacity:0.8;}