[Proto-Scripty] help me, about Class.create

[쏘주망태]

// my code :

var Parent = Class.create({
  intro:{
     name:'',
     age:0
  },
  initialize:function(){},
  show:function(){
    document.write(this.intro.name);
  }
});

var ChildA = Class.create(Parent, {
  initialize:function(){
    this.intro.name = 'A';
    this.intro.age = 10;
  }
});


var ChildB = Class.create(Parent, {
  initialize:function(){
    this.intro.name = 'B';
    this.introl.age = 20;
  }
});

ex1)
var a = new ChildA();
var b = new ChildB();

a.show(); // => print 'B'   <<<< I can't understand..:(
b.show(); // => print 'B'


ex2)
var b = new ChildB();
var a = new ChildA();

a.show(); // print 'A'
b.show(); // print 'A'  <<<< I can't understand..:(

//=========================
Why do these problems occur?

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