JavaScript继承写法

构造函数＋原型法

function person(name,age){
    this.name = name;
    this.age = age;
}
person.prototype.say = function(){
    console.log(this.name+":"+this.age);
}

function superman(name,age){
    person.call(this,name,age);
}
superman.prototype = new person();
superman.prototype.fight = function(){
    this.say();
    console.log("fighting...");
}

var s = new superman('superman',29);
s.fight();