Hi Guys,
I want to add a class on a DIV, when it is visible to user.
It is working by defining scroll to 200 but it may not work if i have more content on top. So please tell me the simplest way to add class when the DIV is actually visible.

Please see this website for reference (animated content) gojavas . com

$(document).scroll(function() {    
var scroll = $(this).scrollTop();
if (scroll >= 200) {
<div id="space"></div>

<div class="circle"></div>