Ajax based commenting system In Drupal 7 I'm facing one problem, I'm going to implement a comment system in that way that it should work as chatting systems. I've a content type Article, at the end there is a comment box where users can leave comments.

If I add a comment to the article it should be showed in every user's browser if they are viewing it, and at the same time they can debate/talk about that article without refreshing the page. 

It will be real time commenting.
We have solved this issue with two modules


Ajax Comments



  Provides ajax comments to Drupal sites (commenting like a social networking sites: Facebook, Google+, vk.com etc).



Block Refresh



  Block Refresh allows an administrator to configure a block to refresh it's content via 3 different methods: automatically via a timer (eg every 30 seconds) , manually via a 'refresh' link, and once on page load.


You can view the real sample at http://beinghuman.org/.