Widget back to top terkeren dan ter-ringan

Zaidan-ng puas ane setelah share widget sosbook kali ini ane mau kasih widget back to top yg ringan nih sob
mau tau kya apaan?

CARANYA

masuk ke blogger
ambil template
edit html
cari code ]]></b:skin>
copy code dibawah di ATAS/SEBELUM ]]></b:skin>

#bs-bt-top-nav {position: fixed;cursor: pointer;background: rgba(0, 0, 0, 0.78);color: white;padding: 10px 20px;border-radius: 3px;bottom: 22px;right: 90%;}
#topcontent {margin-bottom: 10px;}
.c_images img {width: 57px;height: 57px;}
.c_images img {width: 57px;height: 57px;}
.selectnav { display: none; }
.c_images img {width: 57px;height: 57px;}
.selectnav { display: none; }
.c_images img {width: 57px;height: 57px;}
.selectnav { display: none; }

6.nah udah setelah itu cari code </body>
7.nah letakan kode dibawah tpt di SEBELUM ATAU SESUDAH </body>

<a id='bs-bt-top-nav' title='Back to top'>Back to top</a>
<script type='text/javascript'>
//<![CDATA[
$(window).scroll(function() {
if($(this).scrollTop() > 200) {
$('#bs-bt-top-nav').show();
} else {
$('#bs-bt-top-nav').hide();
}
});
$('#bs-bt-top-nav').hide().click(function() {
$('html, body').animate({scrollTop:0}, 1000);
return false;
});
//]]>
</script>