prototype原型链

// object 属性：值

var p1 = {
 name: "yuan",
 age: 18
}

var p2 = {
 name: "rain",
 age: 20
}
console.log(p1.name)
console.log(p1.age)
console.log(p2.name)
console.log(p2.age)

// 构建函数对象
// 函数简易表达
function add(){

}