<style>    
    #aposcroll a {    
    text-decoration:none;    
    color:red;    
    }    

    #aposcroll:hover {    
    background-color:rgba(200, 200, 200, 0.7);    
    box-shadow:0px -5px 10px #777;    
    }    
    </style>    
    <div style="padding:30px 5px 0px 5px;position:fixed;top:0px;right:0px;z-index:999;width:70px;height:100%;opacity:0" id="aposcroll"><center><a href="javascript://">▲ Вверх</a></center></div>    

    <script>    
    // Кнопка Вверх by Apocalypse    
    var as = $('#aposcroll');    
    as.click(function() {    
    $(document).scrollTo(0, 500);    
    });    
    document.onscroll = function() {    
    var apolst = '0.'+$('body').scrollTop();    
    if(apolst.length == 5) {    
    as.stop().fadeTo(500, apolst);    
    } else if(apolst.length == 4 || apolst.length == 3) {    
    as.stop().fadeTo(500, 0);    
    };    
    };    
    // apo-ucoz.com (c) 2012    
    </script>