How to know if ur invisible chatters are online in yahoo messenger?

Your friend used the Stealth method to show or hide his online presence to a selective few. Here's how to do it. Sign in as 'Invisible to everyone'. Click on the contact name/id you want to hide from, click 'Contacts', click 'Stealth Settings'...select any of the following: 'Appear online', 'Appear Offline', 'Appear Permanently Offline'. Read below so you will understand more the workings of "Stealth Settings". If you want to show your online presence selectively, then you can individually keep the stealth setting for each contact in your messenger list. It’s easier if you have organized your contact lists into different groups so that you can keep the stealth settings at a group level. o set the stealth setting for a contact or a group, right click and roll over the mouse to select Stealth Settings and choose between Appear online, Appear offline or Appear permanently offline. When you appear offline to a few contacts and online to the other set of contacts, you can easily identify to whom you are shown online or otherwise. If a particular contact or group name is italicized that means you appear offline to them. By this way you have the right to display your online presence to only whom who wanted and when you want it.

Read this article http://yahoo-invisible.ikitek.com/ or http://www.yahoofreak.com/yahoo-messenger-invisible or http://answers.yahoo.com/question/index?qid=20071116051859AARHbIR

he simply singned in as invisible and after he selected few persons or only you to be available for. also i heard that there is a program who can reveal u who is online even if they hide, just try to find it on google

i can help with a program so u can see whos online ?