I believe this will be the simplest way of doing it. These days almost every website provides a top button so the end user can quickly go to the top of the web page. Here is the code
HTML Code
<a id="top" onclick="topFunction();" style="display: block; cursor: pointer;">Go to Top</a>
And the following function with one line jquery code.
function topFunction() { $("html, body").animate({ scrollTop: 0 }, "slow"); //jquery animate method. }