Increment by 1 every 15 seconds

I need to develop this feature for a charity site displays a number that counts up 1 every 15 seconds. This is to show how many times a kid is abused in this country.

I’ve been researching this and haven’t been able to find anything helpful yet.

I figured this piece of code was a good start:

function doSomething() {

Great! Thanks for your help. That’s what I needed.

<span id=“cabu”>0</span>

var cabu = document.getElementById(“cabu”).firstChild, count = 0;
setTimeout(“ = ++ count”, 15000);

It would be better to have the counter run against a certain date. i.e. Jan 1, 2010. And increment per 15 seconds of time since that day.