gistfile1.js

// This is just an example of a quick way of setting up a new instance with an automatic call to "init"
//
// Create our attachClass method
Object.prototype.attachClass = function(name, o){
    this[name] = function(){
        if(typeof(this.__init) == 'function'){
            this.__init.apply(this, arguments);
        }
    }
    this[name].prototype = o;
}

// Declare our site object
var MySiteObj = {};

MySiteObj.attachClass('Person', {
    __init: function(o){
        alert("Hi, I'm " + o.age + " years old");
        this.sex = o.sex;
    },
    getSex: function(){
        return this.sex;
    }
});

// Try it out!
var p = new MySiteObj.Person({ age: 15, sex: 'yes PLZ LOL ROFL!!!!' });
alert(p.getSex());