ASP - Pop-Up Reminder

got the eCRM almost done...solved a few MAJOR hurdles...thanks to 
the crew at Haneng.com ...now I'm trying to figure out how to 
implement some kind of call scheduler..that can pop-up at a given time 
(when rep schedules a call back to customer) I know ASP is static..so I 
was thinking maybe Java...
anyone know where to start or seen something similar around the 
net...

This is what I would like to accomplish w/ ASP if possible..

Display a pop-up reminder, a short message that is programmed to 
"pop-up" at pre-defined time intervals.
Each reminder could be set to "go-off" at a particular date and time, or 
at regular intervals as specified by the user.
Once the reminder notice is displayed, the user can :

--View the reminder by clicking on a "View" button 
--Cancel the reminder by clicking on the "Cancel" button 
--Click on a "Snooze" or "Re-schedule" button to dismiss the reminder 
until another convenient time 

The pop-up reminder will only "pop-up", or be displayed for the user 
who initially set the reminder.