python format for javascript

gistfile1.js

// These prototypes make life a little easier.
String.prototype.trim = String.prototype.trim || function trim() { return this.replace(/^\s\s*/, '').replace(/\s\s*$/, ''); };
if (!String.prototype.format) {
	String.prototype.format = function () {
		var args = arguments;
		return this.replace(/{(\d+)}/g, function (match, number) {
			return typeof args[number] != 'undefined'
			  ? args[number]
			  : match
			;
		});
	};
}