web based timer
<p>Is there anyway to create a variable speed timer in the browser that will give the exact same results for all operating systems and browsers? If I want 140 beats per minute for every user regardless of their computer speed.</p>

<p>I've been using javascript setTimeout() and setInterval() but I think they are dependant on the speed of the computer and the amount of code in the program.
How do I incorporate the system clock into a browser? Or any other ideas?</p>
