计算你女朋友活了多长时间

var now=new Date();//创建当前时间
var birth=new Date("1989/11/23");//创建方法1
var birth2=new Date(1989,10,23);//创建方法2
var birth3=new Date(birth2.getTime());//创建方法3
var days=parseInt((now-birth)/1000/60/60/24);
var days2=parseInt((now-birth)/1000/60/60/24);
var days3=parseInt((now-birth)/1000/60/60/24);
console.log(days);
console.log(days2);
console.log(days3);
console.log(birth3.getFullYear());  //1989
console.log(birth3.getMonth()); //10   ,也就是11月