LoRz

<a href="ymsgr:sendIM?[username]">
<img border="0" src="http://mail.opi.yahoo.com/online?u=[username]&m=g&t=1"/>
</a>

Change [username] to your yahoo id.

You can change the image source with any of the links

• http://mail.opi.yahoo.com/online?u=[username]&m=g&t=0
  
  This will show you as a yellow smiley if the person is online and gray if the person is offline or invisible.
  


• http://mail.opi.yahoo.com/online?u=[username]&m=g&t=1
  
  This will show up as a button with “Online Now” or “Not Online“
  


• http://mail.opi.yahoo.com/online?u=[username]&m=g&t=2
  
  This will show an image (125×25) with “I am Online send me a message” or “Not Online right now“
  


• http://mail.opi.yahoo.com/online?u=[username]&m=a&t=0
  
  This shows a text with “[username] is ONLINE or NOT ONLINE“
  


• http://mail.opi.yahoo.com/online?u=[username]&m=a&t=1
  
  This shows “00” if person is offline and “01” if his status is online.