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;

}