ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
Chapter 18. ActionScript Language Reference
Date.getMilliseconds( ) Method
Flash 5
the milliseconds of a date
date.getMilliseconds()
Returns
An integer from 0 to 999, representing the milliseconds of date. Note that it does not represent the milliseconds from 1970 see Date.getTime( ) rather, it represents the fractional remainder of the seconds indicated by the specified Date object.