millisecond countdown timer

I'm trying to create a timer that counts down in years, months, days, hours, minutes, seconds and milliseconds. I've found a few guides online, but they are sort of not easy to understand, or do not do the milliseconds. Can anyone help me do something like this, say, for this friday at 13:30.

so it could read 0y 0m 2d 2h 11m 50ms

and counts down the milliseconds. I would show code to demonstrate that I have actually tried to do this myself, but it all failed so dismally that i'd be embarrassed to.

Thanks for any help!
hibbsusanAsked:
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BuggyCoderCommented:
download the sample code from here and make the changes to include year, month and milliseconds....

http://www.hashemian.com/tools/javascript-countdown.htm
hibbsusanAuthor Commented:
Right. I couldn't figure out how to make this one display milliseconds -

Thanks!
BuggyCoderCommented:
First Download this js file:-
http://scripts.hashemian.com/js/countdown.js

Next modify the DisplayFormat variable as:-
DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds, %%MS%% MilliSeconds.";

Next in coutback method add this line for milliseconds:-
DisplayStr = DisplayStr.replace(/%%MS%%/g, calcage(secs*1000,1,1000));

i hope you will make rest of the changes now...

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