Javascript - Format Number to Currency

gistfile1.js

//http://stackoverflow.com/questions/149055/how-can-i-format-numbers-as-money-in-javascript
Number.prototype.formatMoney = function(c, d, t){
	var n = this, 
	c = isNaN(c = Math.abs(c)) ? 2 : c, 
	d = d == undefined ? "." : d, 
	t = t == undefined ? "," : t, 
	s = n < 0 ? "-" : "", 
	i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", 
	j = (j = i.length) > 3 ? j % 3 : 0;
	return '$' + s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
};