How can users post after posts of others?
<p>I want to display an <code>add comment</code> button(like in here or FaceBook) for all of the users' posts. </p>

<p>As you can see in here, if you click "add comment" button, small input box opens and your comment appears right below where you add it with smaller size than normal posts. </p>

<p>I am confused about which language would be the best for this. I know a little about JavaScript and jquery but i think doing it with php is not possible. An idea or example to do that would be greatly helpful.</p>
