Forum Moderators: open
onloadevent in your body tag.
But now most of the browsers have pop-up blockers. Even IE now has internal pop up blocker built in.
Also generally it is a bad pratice to use pop ups without users initiating them. I suggest you think twice or more times before you go that path.
In your <.htaccess> file:
AddHandler server-parsed.html
In your page
<!--#include virtual="whatsnew.html"-->
The SSI file (whatsnew.html)
<TABLE width=150 border=0 padding=5 bgcolor=yellow align=right><TR><TD>Blah blah blah></TD></TR></TABLE>