Tombol ToTop Bounce

#toTop {text-align:center;font-size:20px;position:fixed;bottom:40px;right:5px;cursor:pointer;display:none;}

<div id='toTop'>
<img src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbztdsnPBLKdMEqG4Fz_G7MC81AHqjoFp65zwnJbHTjcBKNb3MTJ_w3P7yYvJQoOj1Z_DLdZ7jkC6kHOhZbdUkyIE9uFiNe1f7v5yYOeBBoa4AbuTWK9LrigJaNBXX7wEDVI6KcnaRTW8/s800/plus.gif'/>
</div>

<script type='text/javascript'>
$(function() {
    $(window).scroll(function() {
        if($(this).scrollTop() &gt; 100) {
            $(&#39;#toTop&#39;).fadeIn();    
        } else {
            $(&#39;#toTop&#39;).fadeOut();
        }
    });

    $(&#39;#toTop &gt; img&#39;).click(function() {
        $(&#39;body,html&#39;).animate({scrollTop:0},800)
                .animate({scrollTop:25},200)
                .animate({scrollTop:0},150)
                .animate({scrollTop:10},100)
                .animate({scrollTop:0},50);
    });    
});
</script>