34 var time1 = new Date('2000/01/01'); var time2 = new Date('2000/01/31'); ale

将时间段限制在1年内，可参考一下
var time1 = new Date('2000/01/01');  var time2 = new Date('2000/01/31');  alert((time2-time1)/1000/60/60/24); 

这个是天数。比较