Scroll to the top of page using jQuery JavaScript

<!DOCTYPE html>
<html>
<head>
<title>jQuery Scrolltop Demo example</title>
<script type="text/javascript">
function scrollToTop(){
window.location = '#';
}
</script>
 </head>	
<body>
<p>Demo Text Demo Text ....</p>
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<h4 ><a href="javascript:void(0);" onclick="scrollToTop()" >Click to scroll top </a></h4> 


<div></div>

</body>
</html>