Time Countdown

Our system authenticates users on Public Wifi HotSpots for a given period of time. The period of time is determined by the user when they book access. When a users opens a web browser on their computer they are directed to a login screen where they are authenticated for the time they have booked. At this point we want to display another popup window which will display the time remaining for their session. We have developed a basic javascript to do this (see attached)which displays the time. We would like the following fucntionality added to the script: 1. The window can not be resized or closed - only minimised or restored 2. That it will restore when the time reaches 5 mins and 1 minute 3. A progress bar idicating the amount of time left ( similar to the software installs)