function Person (){}

//简单的json对象(此对象与Person类没任何关系，只是让大家观察两者的写法区别)var obj = {name:‘lemon’,age:‘18‘}//通过Person来实例化一个对象(对象名称相同为了对比)var obj = new Person;//定义对象属性obj.name = ‘lemon‘//定义对象方法obj.fn = function(){console.log(‘www.lemon-x.ml‘)};//类是无法使用对象中的属性和方法的、对象也是无法使用类的方法和属性的console.log(obj.name);obj.fn();//定义对象属性以及方法Person.num = 1;Person.fn = function(){console.log(‘我是类方法‘)}//进行调用console.log(Person.num);Person.fn();

//我们可以通过prototype可以给这个类下面的所有对象添加一个共有的属性或方法

Person.prototype.age = 18;
Person.prototype.data = http://www.mamicode.com/function(){
    console.log(this.name+‘:‘+this.age)
};
console.log(obj.age);
obj.data();

     //父类    function Parent(add,net,no,teacher) {        this.add = add;        this.net = net;        this.no = no;        this.teacher = teacher;    }    //子类    function Child(name,age,sex,id) {        this.name = name;        this.sex = sex;        this.age = age;        this.id = id;    }    /*继承方法*/    Object.prototype.extend = function(ParentObj){        for(var i in ParentObj){            this[i] = ParentObj[i]        }    };    /*实例化子类，实例化父类，子类调用继承方法*/    var parent = new Parent("china","www.lemon-x.ml","1608","ccy");    var child = new Child("lemon","男","18","1001");    //调用我们写好的继承方法    child.extend(parent);    //现在我们就可以调用父类中的属性以及方法了    console.log(child.add);//如果看不懂看下面这个简单的     //父类    function Parent(add) {        this.add = add;           }    //子类    function Child() {          }    /*继承方法*/    Object.prototype.extend = function(ParentObj){        for(var i in ParentObj){            this[i] = ParentObj[i]        }    };    /*实例化子类，实例化父类，子类调用继承方法*/    var parent = new Parent("china");    var child = new Child();    //调用我们写好的继承方法    child.extend(parent);    //现在我们就可以调用父类中的属性以及方法了    console.log(child.add);

 //call 无参    function Person(){        this.name = ‘lemon‘;        this.age = ‘18‘;    }    function show(){        alert(this.name+‘:‘+this.age);    }    var p = new Person;    //通过call方法使show方法中的this指向p对象    show.call(p);    //call有参    function Person2(){        this.name = ‘lemon‘;        this.age = ‘18‘;    }    function show2(id,add){        alert(this.name+‘:‘+this.age+‘,‘+id+‘,‘+add);    }    var p2 = new Person2;    //通过call方法使show方法中的this指向p对象    show2.call(p2,‘001‘,‘山东‘);    //apply 无参    function Person3(){        this.name = ‘lemon‘;        this.age = ‘18‘;    }    function show3(){        alert(‘apply无参:‘+this.name+‘:‘+this.age);    }    var p3 = new Person3;    //通过apply方法使show方法中的this指向p对象    show3.apply(p3);    //apply有参    function Person4(){        this.name = ‘lemon‘;        this.age = ‘18‘;    }    function show4(id,add){        alert(‘apply有参‘+this.name+‘:‘+this.age+‘,‘+id+‘,‘+add);    }    var p4 = new Person4;    //通过apply方法使show方法中的this指向p对象    show4.apply(p4,[‘001‘,‘山东‘]);    /*通过call apply实现继承*/    //父类    function Parent(add,net,no,teacher) {        this.add = add;        this.net = net;        this.no = no;        this.teacher = teacher;    }    //子类    function Child(name,age,sex,id) {        this.name = name;        this.sex = sex;        this.age = age;        this.id = id;        //Parent.call(this,‘山东‘,‘www.lemon-x.ml‘,‘001‘,‘ccy‘);        Parent.apply(this,[‘山东‘,‘www.lemon-x.ml‘,‘001‘,‘ccy‘]);    }    var child = new Child(‘lemon‘,‘18‘,‘man‘,‘002‘);    console.log(child.net);