https://www.e-discoverypublication.com/wp-content/themes/seopress/js/backtotop.js?ver=1.6.1

1( function( $ ) {
2	$(document).ready(function() {
3			
4		//back to top
5		var scrollTrigger = 500;
6		$(window).on('scroll', function () {
7			var scrollTop = $(window).scrollTop();
8			if( scrollTop > scrollTrigger )
9			{
10				$('#back-to-top').addClass('back-to-top-show');
11			}
12			else
13			{
14				$('#back-to-top').removeClass('back-to-top-show');
15			}
16		});
17				
18		$('#back-to-top').on('click', function (e) {
19			e.preventDefault();
20			$('html,body').animate({
21				scrollTop: 0
22			}, 700);
23		});
24		//back to top END
25			
26	});
27} )( jQuery );