I have provided a link jsFiddle so you can see my problem (http://jsfiddle.net/QVBep/1/).

I have a simple calculator which calculates the duration from start to stop.

This works perfectly well, however, at present, it returns a value like so (12:05.4444444444444444444).

My aim is to chop off those meaningless decimal places to return value like so (12:05.04).

I have tried using .toFixed() and Math.round() functions but have had no success!

Any help would be greatly appreciated! Thanks!