function number_format (number, decimals, dec_point, thousands_sep) {
	// Formats a number with grouped thousands
	//
	// version: 906.1806
	// discuss at: http://phpjs.org/functions/number_format
	// +   original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
	// +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +     bugfix by: Michael White (http://getsprink.com)
	// +     bugfix by: Benjamin Lupton
	// +     bugfix by: Allan Jensen (http://www.winternet.no)
	// +    revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
	// +     bugfix by: Howard Yeend
	// +    revised by: Luke Smith (http://lucassmith.name)
	// +     bugfix by: Diogo Resende
	// +     bugfix by: Rival
	// +     input by: Kheang Hok Chin (http://www.distantia.ca/)
	// +     improved by: davook
	// +     improved by: Brett Zamir (http://brett-zamir.me)
	// +     input by: Jay Klehr
	// +     improved by: Brett Zamir (http://brett-zamir.me)
	// +     input by: Amir Habibi (http://www.residence-mixte.com/)
	// +     bugfix by: Brett Zamir (http://brett-zamir.me)
	// *     example 1: number_format(1234.56);
	// *     returns 1: '1,235'
	// *     example 2: number_format(1234.56, 2, ',', ' ');
	// *     returns 2: '1 234,56'
	// *     example 3: number_format(1234.5678, 2, '.', '');
	// *     returns 3: '1234.57'
	// *     example 4: number_format(67, 2, ',', '.');
	// *     returns 4: '67,00'
	// *     example 5: number_format(1000);
	// *     returns 5: '1,000'
	// *     example 6: number_format(67.311, 2);
	// *     returns 6: '67.31'
	// *     example 7: number_format(1000.55, 1);
	// *     returns 7: '1,000.6'
	// *     example 8: number_format(67000, 5, ',', '.');
	// *     returns 8: '67.000,00000'
	// *     example 9: number_format(0.9, 0);
	// *     returns 9: '1'
	// *     example 10: number_format('1.20', 2);
	// *     returns 10: '1.20'
	// *     example 11: number_format('1.20', 4);
	// *     returns 11: '1.2000'
	// *     example 12: number_format('1.2000', 3);
	// *     returns 12: '1.200'
	var n = number, prec = decimals;

	var toFixedFix = function (n,prec) {
		var k = Math.pow(10,prec);
		return (Math.round(n*k)/k).toString();
	};

	n = !isFinite(+n) ? 0 : +n;
	prec = !isFinite(+prec) ? 0 : Math.abs(prec);
	var sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep;
	var dec = (typeof dec_point === 'undefined') ? '.' : dec_point;

	var s = (prec > 0) ? toFixedFix(n, prec) : toFixedFix(Math.round(n), prec); //fix for IE parseFloat(0.55).toFixed(0) = 0;

	var abs = toFixedFix(Math.abs(n), prec);
	var _, i;

	if (abs >= 1000) {
		_ = abs.split(/\D/);
		i = _[0].length % 3 || 3;

		_[0] = s.slice(0,i + (n < 0)) +
			  _[0].slice(i).replace(/(\d{3})/g, sep+'$1');
		s = _.join(dec);
	} else {
		s = s.replace('.', dec);
	}

	var decPos = s.indexOf(dec);
	if (prec >= 1 && decPos !== -1 && (s.length-decPos-1) < prec) {
		s += new Array(prec-(s.length-decPos-1)).join(0)+'0';
	}
	else if (prec >= 1 && decPos === -1) {
		s += dec+new Array(prec).join(0)+'0';
	}
	return s;
}