【javascript】简单原型链、借用构造函数

javascript中继承（实现继承）的方式--简单原型链

　　1 .简单原型链事例

　　 function Super() { };
        Super.prototype = {
            name:"Super",
            sayName:function () {
                alert(this.name);
            }
        }

        function Sub() {
            //Sub.prototype.name = "sub";
        }

        Sub.prototype = new Super();

        var sub1 = new Sub();
        sub1.sayName();//提示Super

　　 2. 简单原型链和借用构造函数事例

　　 function Super(name,age) {
            this.name = name;
            this.age = age;
            this.color = ["red", "blue"];
        };
        Super.prototype = {
            sayName:function () {
                alert(this.name);
            }
        }

        function Sub(name,age) {
            Super.call(this,name,age);
        }

        Sub.prototype = new Super();
        Sub.prototype.sayAge = function () {
            alert(this.age);
        }

        var sub1 = new Sub("sub1",1);
        sub1.sayName();//sub1
        sub1.sayAge();//1
        sub1.color.push("green");
        alert(sub1.color); //red,blue,green

        var sub2 = new Sub("sub2", 2);
        sub2.sayName();//sub2
        sub2.sayAge();//2
        alert(sub2.color); //red,blue