JavaScript中的对象继承关系

function Desk(size,height){
this.size=size;
this.height=height;
}
function MJDesk(size,height){
Desk.call(this,size,height);//这种就叫类继承.
}
var mj = new MJDesk(10,123);

function Desk(size,height){
this.size=size;
this.height=height;
}
function MJDesk(size,height){
Desk.call(this,size,height);//这种就叫类继承.
}
MJDesk.prototype=new Desk();//原型继承
var mj = new MJDesk(12,12);
//此处的原型继承用我们上一章讲的使用一个空函数进行继承的方式更好.