Infinite Scrolling

HTML

<html>
<body id="body">
<div>
Scroll down<br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</div>
</body>
</html>

JavaScript

window.onscroll=function(ev){

  if((window.innerHeight+window.pageYOffset)>=document.body.offsetHeight){
	
    body.innerHTML+='<div>This gets added</div>';

	}
};