js继承——扩展Object方式实现继承

function Parent(name,sex){ ???this.name ?= name; ???this.sex = sex; ???this.sayName = function(){ ???????console.log(this.name+‘ : ‘+this.sex); ???}}Object.prototype.method = function(obj){ ????????for (var attr in obj){ ???????????this[attr] = obj[attr]; ???????}}function Son(age){ ???this.age = age; ???this.show = function(){ ??????console.log(this.name+‘ : ‘+this.sex+‘ : ‘+this.age); ???} ?????}var p1 = new Parent(‘zhangsan‘,‘男‘);var p2 = new Son(23);p2.method(p1);p2.show();