易于维护的写法

function Klass() {
    this.id = new Date().getTime();
    this.name = '';
}

Klass.prototype.get = function() {
    return this.id;
};

Klass.prototype.set = function(name) {
    this.name = name;
};

var test1 = new Klass();
var test2 = new Klass();
test1.set('tttt');
test2.set('qqqq');