Hi,

 

1. you can write script to keep one window instane for the messenger.

 for example , window.open("CuteSoft_Client/CuteChat/NewMessenger.aspx","messengerwindow","");

 You can also use script to save active signal to cookie and let other pages know the messenger is opened.

 

2. that's browser behavior, we can't hide it.

 

3. use <script src="CuteSoft_Client/CuteChat/IntegrationUtility.js.aspx?Chat_StartPartialMessenger=1"></script> to register an user is online for messenger.

 

Regards,

Terry