formatInt

formatInt.js

function formatInt(num) {
	num = parseInt(num);
	str = new String(num);
	if(str.length > 4) {
		var formatted = "";
		do {
			var lastChar = str.length;
			formatted += "," + str.slice(lastChar - 3);
			str = str.slice(0, lastChar - 3);
		} while(str.length > 3);
		str = str + formatted;
	}
	return str;
}