I've been looking forever for this, but never found anything. There are some codes that are close to what I want, but here goes.. User will enter the start date, and choose the duration. The script will calculate the end date automatically. The ones that I found are enter start and end date, returns the duration. Example: Start Date: July 25th, 2007, Duration: 10 Days, End Date: August 2nd, 2007 (Automatically displayed) There are some scripts that I found that is similar to this, but the starting date is fixed for today's date, which means I can't select the starting date.