Today Facebook is the most popular website on the web. Almost everyone who uses internet is on Facebook. Today every one is effected by Facebook. Every one want to integrate all the features and API provided by Facebook to there site. A common feature that every one wants in his/her site is Facebook comments. Well it is quite simple and easy and as you know that i always come with the simple code.
Here is the simple code that you can use to insert Facebook commenting option in your website 
1 2 3 | <div id="fb-root"></div> <script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script> <fb:comments href="Page URL" num_posts="number of comments to display" width="width of comment box"></fb:comments> |
Here is an example of Facebook comments on this site.