JS 面向对象之继承--多种组合继承

    function SuperType(name) {
        this.name = name;
        this.colors = ["red", "blue", "green"];
    }
    SuperType.prototype.sayName = function() {
        alert(this.name);
    }
    function SubType(name, age) {
        SuperType.call(this, name);
        this.age = age;
    }

    //继承方法
    SubType.prototype = new SuperType();
    SubType.prototype.sayAge = function() {
        alert(this.age);
    }

    var instance1 = new SubType("Nicholas", 29);
    instance1.colors.push("black");
    alert(instance1.colors); //red,blue,green,black
    instance1.sayName(); //Nicholas
    instance1.sayAge(); //29

    var instance2 = new SubType("Greg", 27);
    alert(instance2.colors); //red,blue,green
    instance2.sayName(); //Greg
    instance2.sayAge(); //27