.comments-wrap{display:none;}

<div id="comments">
    <div class="comments-wrap">
        <div class="comment">1</div>
        <div class="comment">2</div>
        <div class="comment">3</div>
        <div class="comment">4</div>
        <div class="comment">5</div>
    </div>
</div>

<script>
        function isOnScreen(element){
            var curPos = $(element).offset();
            var curTop = curPos.top;
            var scrollTop = $(window).scrollTop();
            return (scrollTop < curTop);
        };
        $(function(){
            $(window).scroll(function() {
                if(isOnScreen('#comments')){
                    $('.comments-wrap').show(300);
                }
            })
        });
    </script>

test etmeden direk r10 uzerinden yazdim gozden kacirdigim birsey yoksa calismasi gerek hata cikarsa test ederek tekrar yazarim