Note: this uses MooTools v1.11. Here are two different versions of this that people have emailed me which should work with MooTools v1.2, though I haven't tested them:
Emmanuel’s version Cory Gagliardi’s version
List of All Options and Defaults
dayChars
1
Integer. Number of characters for the day names abbreviation
Integer. 1 makes the week start on Monday, and 7 makes it start on Sunday
yearOrder
'asc'
String. Only other valid choice is 'desc'. This is the direction the year dropdown will go, starting from your yearStart, and counting through your yearRange.
yearRange
10
Integer. This how many years the dropdown list will include, starting from your yearStart setting.
yearStart
current year
Integer. Enter the four-digit year, like 1980. This will be where the dropdown list will start, and continue up or down depending on your yearOrder setting.