window.onload=function(){

    new Preson('liujian','男').show();

    new Work('liujian','男','工人').show();

    new Work('liujian','男','工人').ShowWork();

}

function Preson(name,sex){

    this.name=name;

    this.sex=sex;

}

Preson.prototype={

    show:function(){

        console.log(

            this.name

        )

    },

    Sex:function(){

        console.log(

            this.sex

        )

    }

}

function Work(name,sex,work){

    Preson.call(this,name,sex,work);

    this.work=work;

}

/*

for (var i in Preson.prototype) {

        Work.prototype[i]=Preson.prototype[i]

}

*/

Work.prototype=Object.create(Preson.prototype);

Work.prototype.constructor=Work;

Work.prototype={

    show:function(){

        alert(1)

    },

    ShowWork:function(){

        console.log(this.work+','+this.name)

    }

}