巧用get和set，能够直接操作对象属性实现读写，可以极大的提高编程效率，给出一个典型示例：
var test = {
_Name : null,
_Age : 0,
//_Name的读写
set name(name) {this._Name = name;},
get name() {return this._Name;},
//_Age的读写
set age(age) {this._Age = age;},
get age() {return this._Age;}
}
alert(test.name + " " + test.age);//bull 0
test.name = 'lucy';
test.age = 20;
alert(test.name + " " + test.age);//lucy 20
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