Simple JavaScript Timer: substring or datetime?
<p>I have a label with a format ever should be: "00:00:00".</p>

<p>This timer should be count down via JavaScript, when the timer is 0, there should be a "Ended" in the label.</p>

<p>So how do it with the less performence (e.g.: I have a site with 50 timers, they need to be synchron).</p>

<p>My idea is to split this via substring and -1 them, check if it is -01, then decrement the number before, and set it to 59 again.</p>

<p>Is there an easier way?</p>
