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