Find who is invisible in gmail chat (Gtalk)

If you want to know that your particular friend is online and invisible or he/she is offline. Then here is an easy way to find this :

Open your gtalk application and type this email address of your friend in top search textbox

Click his/her profile, it opens in new chatting window.

Click on the down arrow button in the top right corner of the window, here ther is one option Go off the record, click on it.

And then leave any msseage to your friend.

If you get a red text showing the person is offline , can’t receive the message right now that means person is offline and if you dnt recieve such kind of any message then your friend is invisible