一个简单的Javascript的继承案例

function Person(name, age) {
    this.name = name;
    this.age = age;
}
function Male(name, age) {
    Person.apply(this, arguments);
    this.sex = '男';
}

Male.prototype.showSex = function(){
    console.log(this.sex);
}
function F(){}
F.prototype = Person.prototype;
Male.prototype = new F();
Male.prototype.constructor = Male;
var m = new Male("小明", 20);
Person.prototype.showName = function(){console.log(this.name);}
m.showName();
console.log(m.constructor == Male);
console.log(m instanceof Person);
console.log(m instanceof Male);
console.log(m instanceof F);