ITS SO EASY ..DONT WASTE YOUR TIME.LETS TRY IT.YOU CAN KNOW THE SECRET HERE ..
1ST METHOD
Insert the Yahoo Messenger ID in column...then click Check User...
Then you can see the result "ID is invisible, If you wanna check another ID just simply click Scan Again .
2ND METHOD
Insert the ID and Check, then you can find that someone "Invisible"/ Offline,but sometimes the result is incorrect* so you may try the others
3RD METHOD
via http://invisible.ir
The way to check it is the same with the ways above . And the picture below :
4TH METHOD
via IMvironment
Double Click on the user whose status you want to check.
A message window will open.
Click IMVironment button, select See all IMVironments, select Yahoo! Tools or Interactive Fun, and click on Doodle.
The last step and the most important step. After loading the Doodle IMVironment, there will be two possibilities.
If the user is offline,......