First I say thanks for this nice hack.
I modified it a bit. First I put in the date and time the message was written into the message. It happend more then once to me, that I was online and reading around (also in other pages). When I came back to my forum reading a new page, I got a message which seemed to be older than a view minutes.
Next I changed the "write a message form" to display 6 online-members in a row.
Now I am working on a "select-all" button, but only for admin/mods.
It is not hard to do these changes, but if someone is interested, I can post the code.
And I called it "PopUp-Message", because IM is not that well known here...
