Also, I highly suggest that you edit CalendarMonthSimple.pm and change the full text days (Sunday, Monday, etc.) to two letter days, AND also remove the <P> and </P> tags from around the links. This will allow the calendar to be sized to show up in a window of around 220 by 220 - perfect for a popup like this.

What does this little button do . .<Click>; "USER HAS SIGNED OFF FOR THE DAY"