摘要：1 //1.原型链的继承 2 function Box(){ 3 this.age=12; 4 } 5 function Desk(){ 6 this.user="mly"; 7 } 8 Desk.prototype=new Box(); 9 var desk=new Desk();10 alert(desk.age);//结果为:1211 //缺点:子类型还无法给父类型传递参数 1 //2.对象冒充的继承 2 function Box(age){ 3 this.age=a... 阅读全文