a.vote_up,a.vote_down{display:inline-block;background-repeat:none;background-position:center;height:16px;width:16px;margin-left:4px;text-indent:-900%;outline:none;}
a.vote_up{background:url("/graph/common/img/jaime/thumb_up.png");}
a.vote_down{background:url("/graph/common/img/jaime/thumb_down.png");}