https://www.dublin18dentalrooms.ie/js/back-to-top.js

1	var back_to_top_interval;
2	$(document).ready(function(){
3		$("#back-to-top").hide();
4		$(function () {
5			$(window).scroll(function(){
6				if ($(window).scrollTop()>70)
7				{
8					show_back_to_top();
9				}
10				else
11				{
12					hide_back_to_top();
13				}
14			});
15
16			//back to top
17			$("#back-to-top").click(function(){
18				$('body,html').animate({scrollTop:0},800);
19				return false;
20			});
21		});
22	});
23
24	function show_back_to_top () {
25		$("#back-to-top").fadeIn(500);
26
27		clearInterval(back_to_top_interval);
28		back_to_top_interval = setTimeout(hide_back_to_top, 5000);
29	}
30
31	function hide_back_to_top () {
32		clearInterval(back_to_top_interval);
33		$("#back-to-top").fadeOut(500);
34	}