formayMoney prototype function in javascript

formatMoney.js

/* global prototype formatMoney function
	    * 	params: 
	    *		c (integer): count numbers of digits after sign
	    *		d (string): decimals sign separator
	    *		t (string): miles sign separator
	    *
	    *	example:
	    *		(123456789.12345).formatMoney(2, ',', '.');
	    *			=> "123.456.789,12" Latinoamerican moneyFormat
	    */
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) : "");
		 };