<style type="text/css">   
#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 type="text/javascript">   
// 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>