js 对象继承

<script>
function Person(name,sex) {
    this.name=name;
    this.sex=sex;
}
Person.prototype.showName=function () {
    alert(this.name);
};
Person.prototype.showSex=function () {
  alert(this.sex);
};


function Worker(name,sex,job) {
    //这是调用父级,的构造函数-----为了继承属性(学名：构造函数伪装)
    //this->new 出来的worker 对象
    Person.call(this,name,sex);
    this.job=job;
};
 //原型链 通过原型来继承父级的方法
 // Worker.prototype=Person.prototype;
for(var i in Person.prototype){
    Worker.prototype[i]=Person.prototype[i];
}

var oP2=new Worker("ble","男","程序员");
oP2.showName();

Worker.prototype.showJob=function () {
  alert(this.job);
};

var oP2s=new Person("ble","男","程序员");
oP2s.showJob();
</script>