#xet_top { z-index:1001; display:none; text-decoration:none; position:fixed; bottom:20px; right:20px; overflow:hidden; width:47px; height:47px; border:none; text-indent:-999px; background:url(../img/top.png) no-repeat left top #000; }
#xet_top_hover { display:block;  width:47px; height:47px; overflow:hidden; float:left; opacity: 0; -moz-opacity: 0; filter:alpha(opacity=0); background:url(../img/top.png) no-repeat left top #3b3b3b;}
#xet_top:active, 
#xet_top:focus { outline:none; }