<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<h3>Hi Gyes put scrollup <mark>div & JS</mark> in your html aney where</h3>
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<h3>on clock dive window scroll top </h3>
</div>
<div class="scrollup" href="#"><i class="fa fa-angle-double-up" aria-hidden="true"></i> </div>
</div>
<script>
$('.scrollup').click(function() {
$("html,body").animate({
scrollTop: 0
}, 1000);
return false;
});
</script>