/* Back To Top   
  ================================================== */   
  #backtotop {   
   position: fixed;   
   right:0px;   
   display:none;   
   bottom: 18px;   
   margin: 0 75px 0 0;   
  }   

  #backtotop a {   
   text-decoration:none;   
   border:0 none;   
   display:block;   
   width:45px;   
   height:45px;   
   background: url(http://http://bestonucoz.ru/img/back_to_top_btn.png) no-repeat 50% 50%;   
   background-color:#95ae20;   
   -webkit-transition: all 0.1s ease-in-out;   
   -moz-transition: all 0.1s ease-in-out;   
   -o-transition: all 0.1s ease-in-out;   
   -ms-transition: all 0.1s ease-in-out;   
   transition: all 0.1s ease-in-out;   
  }   

  #backtotop a:hover {background-color:#404040;}   
  /*================================================= */

<div id="backtotop" style="display: block;"><a href="#"></a></div>   
  <script type="text/javascript" src="http://http://bestonucoz.ru/js/up.js"></script>