javascript simple class

gistfile1.js

function Person(id, name) {
    this.id = id;
    this.name = name;

    this.toString = function() {
        return "" + this.id + ": " + this.name;
    }

    var test = function() {
        alert(123);
    }
}

var person = new Person(1, "asinbow");
console.log(person.toString());

var Person = function(id, name) {
    return {
        toString: function() {
            return "" + id + ": " + name;
        }
    }
};
var person = Person(2, "asinbow");
console.log(person.toString());