<a title="Back to TOP" style="position: fixed; right: 15px; bottom: 15px; outline: medium none; border: 0px none;" href="#"><img border="0" alt="Back to TOP" src="http://i.imgur.com/Ffb7p.png"></a>

<style type="text/css">
#w2b-StoTop {-moz-border-radius: 5px;-webkit-border-radius: 5px;border-radius: 5px; width:100px;background-color: #EEEEEE;background-color: rgba(238, 238, 238, 0.6);filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#99EEEEEE',EndColorStr='#99EEEEEE');text-align:center;padding:5px;position:fixed;bottom:10px;right:10px;cursor:pointer;color:#444;text-decoration:none;border:1px solid #C9C9C9;}
</style>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script type='text/javascript'>
    $(function() {
        $.fn.scrollToTop = function() {
            $(this).hide().removeAttr("href");
            if ($(window).scrollTop() != "0") {
                $(this).fadeIn("slow")
            }
            var scrollDiv = $(this);
            $(window).scroll(function() {
                if ($(window).scrollTop() == "0") {
                    $(scrollDiv).fadeOut("slow")
                } else {
                    $(scrollDiv).fadeIn("slow")
                }
            });
            $(this).click(function() {
                $("html, body").animate({
                    scrollTop: 0
                }, "slow")
            })
        }
    });
    $(function() {
        $("#w2b-StoTop").scrollToTop();
    });
</script>
<a href='#' id='w2b-StoTop' style='display:none;'><img src='http://www.3asq.com/img/uploads/13272648341.png  '/> </a>