A .NET inspired String.format function in JavaScript

String.format.js

if (!String.format)
String.format = function String_format(value) {
	if (arguments.length === 0)
		return null;
	
	for (var i = 1, l = arguments.length; i !== l; ++i)
		value = value.replace(RegExp('\\{' + (i - 1) + '\\}','gm'), arguments[i]);
	
	return value;
};