Date.prototype.getUTCMilliseconds()
The getUTCMilliseconds() method returns the milliseconds
portion of the time object's value according to universal time.
Syntax
getUTCMilliseconds()
Return value
A number.
If the Date object represents a valid date, an integer between 0 and 999, representing
the milliseconds portion of the given Date object according to universal time.
Otherwise, NaN
if the Date object doesn't represent a valid date.
Not to be confused with Unix epoch time. To get the total milliseconds since 1970/01/01,
use the getTime() method.