JS Class

class.js

var Class = function(parent){

  var klass = function(){
    this.init.apply(this, arguments);
  }

  if(parent){
    var subclass = function(){};
    subclass.prototype = parent.prototype;
    klass.prototype = new subclass;
  }

  klass.prototype.init = function(){};

  klass.fn = klass.prototype;
  klass.fn.parent = klass;
  klass._super = klass.__proto__;

  // Adding class properties
  klass.extend = function(obj){
    var extended = obj.extended;
    for(var i in obj){
      klass[i] = obj[i];
    }

    if(extended) extended(klass);
  }

  // Adding class properties
  klass.include = function(obj){
    var included = obj.included;
    for(var i in obj){
      klass.fn[i] = obj[i];
    }

    if(included) included(klass);
  }

  return klass;
}

var Person  = new Class();

Person.extend({
  find: function(){ return console.log("find:", arguments);}
});

Person.include({
  save: function(){ return console.log("save:", arguments);}
});


Person.find(1)
new Person().save({validate: false})