.stt-top { /* One of these will hide it without using display:none =P */
   display:block;
   text-indent:-9999em;
   font-size:0;
   line-height:0;
   height:0;
   visibility:hidden;
}
.stt-gototop {
   position:absolute;
   z-index:5000;
   :px;
   :px;
   background:url("STT_IMAGES_URL/") no-repeat top left;
   text-indent:-9999em;
   width:px;
   height:px;
   }
.stt-gototop:hover,
.stt-gototop:active,
.stt-gototop:focus {
   outline:0;
}