How to Get into the "Invisible Mode" on Facebook

1.First of all,log in to your  Facebook  account.

2.Then search for an application called "Online Now" in the search bar.

3.Just enable that application and it will provide you with a list of your Online friends even if you are still offline and in this way you can avoid those with whom you donot want to chat and hide yourself from others. 

enjoy!!!!!!!!!!