How can I format an integer to a specific length in javascript?

Question

I have a number in Javascript, that I know is less than 10000 and also non-negative. I want to display it as a four-digit number, with leading zeroes. Is there anything more e

Answer 1

A funny (but interesting) way to prefix numbers with zeros:

function FormatInteger(num, length) {

    return (num / Math.pow(10, length)).toFixed(length).substr(2);
}