应该是叫寄生继承模式 JavaScript的继承 Class

//JavaScript面向对象编程
var Class=function(){

}
Class.extend=function(props){
    //继承父类
    var prototype=Object.create(this.prototype)
    //初始化函数ctor
    var _Class=function(){
        if (this.ctor)
            this.ctor.apply(this, arguments);
    }
    //当前类属性和方法
    for(var k in props){
        prototype[k]= props[k]
    }
    _Class.prototype = prototype;
    //类继承
    _Class.extend=this.extend;
    //类扩展
    _Class.expand = function (prop) {
        for (var name in prop) {
            prototype[name] = prop[name];
        }
    };
    return _Class

}
//demo
var Node=Class.extend({
    name:"caoke1",
    ctor:function(name){
        this.name=name
    }
})
var Node2=Node.extend({
    name:"caoke1",
    ctor:function(name){
        this.name=name
    }
})
cc=console
var n=new Node("caoke2")
var n2=new Node2("caoke3")
cc.dir(n)
cc.log(n2)