[JAVASCRIPT] 모바일웹 무한스크롤

<script>
	$(window).on("scroll", function() {
		var scrollHeight = $(document).height();
		var scrollPosition = $(window).height() + $(window).scrollTop();		

		if (scrollPosition > scrollHeight - 500) {			
			//todo
		}
	});
</script>

밑에서 500px일때 동작한다는 의미