Beğendiğim yukarı çık kodunu paylaşmak istedim.

<script></script>
<script>
$(document).ready(function() {
$().UItoTop({ easingType: 'easeOutQuart' });
});
</script>

CSS KODU


#toTop {
display:none;
text-decoration:none;
position:fixed;
bottom:10px;
right:10px;
overflow:hidden;
width:51px;
height:51px;
border:none;
text-indent:-999px;
background:url(http://static.tumblr.com/8jq17g7/Ecym0czgw/ui.totop.png) no-repeat left top;}
#toTopHover {
background:url(http://static.tumblr.com/8jq17g7/Ecym0czgw/ui.totop.png) no-repeat left -51px;
width:51px;
height:51px;
display:block;
overflow:hidden;
float:left;
opacity: 0;
-moz-opacity: 0;
filter:alpha(opacity=0);}
#toTop:active, #toTop:focus {
outline:none;}


DEMO