js對象動態添加屬性，方法

1. 動態添加屬性，方法

var object = new Object();

object.name = "name";

object.age = 19;

>>>{name: "name", age: 19}

object.fun = function(){

　　console.log("這是一個測試")

}

object.fun()

2.修改屬性

object.name=”tom”;
object.alert=function(){
alert(“hello,”+this.name);
}

3.刪除屬性

object.name = undefined

object.age = undefined