String.prototype.format = function(args) {

        var result = this;

        if (arguments.length > 0) {

            if (arguments.length == 1 && typeof (args) == "object") {

                for (var key in args) {

                    if(args[key]!=undefined){

                        var reg = new RegExp("({" + key + "})", "g");

                        result = result.replace(reg, args[key]);

                    }

                }

            }

            else {

                for (var i = 0; i < arguments.length; i++) {

                    if (arguments[i] != undefined) {

                        var reg= new RegExp("({)" + i + "(})", "g");

                        result = result.replace(reg, arguments[i]);

                    }

                }

            }

        }

        return result;

    }