I have a requirement to build the following:
1: A user logs onto the web application using a user name and password
(Done)

2: The user is presented with a web page that contains 3 frames (Done)

3: Based on some event that takes place within the system, I want to display
a specific page in one of the frames in the page that is displayed to the
user......This may happen a number of times while the user is logged into
the session.

Any suggestions on how to pop a page into a frame based upon some event. I
am thinking that this will have to be a service that runs in the
background....but what I really want to know is how to display to a specific
IP address??

Example:

If phone number = 123-123-1234 then
Check who is logged on
Select a logged on user that is not busy
Display pageABC.aspx to the selected user