Detect Invisble yahoo chat users

Chose a person you want to check weather he is online or not.Double click to open the chat window.Now simply invite the person for a voice conference.This is done by clicking on the "conference' button on the top of the chat window.If the talk button appears and turns green then that person is online.But if you receive the message 'Voice chat could not be started ' then the person is offline.Note:Some people use softwares like buddy spy to check who is invisible.I DONT RECOMMEND you to use such third party softwares as they can expose your Pc to hackers by sending your personal information and can even steal information from your Pc.So avoid such softwares and instead use the simple tricks given above.If you have any queries or would like to make some useful contribution to this topic feel free to drop a line in the comments section.