js 中时间相减

var addDate = "获取到你想要的时间";

//注意时间格式是：2012-03-05 11:41:30.910 addDate = new Date(Date.parse(addDate.replace(//-/g, "/")));

var now = new Date();

var diff = now.getTime() - addDate.getTime();

//判断大于七天 if (addDate == 'NaN' || diff > 0 && diff > 7 * 24 * 60 * 60 * 1000) { art("");

}