v2ex show real date

v.user.js

// ==UserScript==
// @name         v2exdate
// @author       [email protected]
// @namespace    http://abc.com
// @description  v2ex show real date
// @include      http://www.v2ex.com/t/*
// @include      http://v2ex.com/t/*
// @include      https://www.v2ex.com/t/*
// @include      https://v2ex.com/t/*
// @run-at       document-end
// ==/UserScript==


function AddDays(num) {
    var newdate = new Date();
    var newtimems = newdate.getTime() - (num * 24 * 60 * 60 * 1000);
    newdate.setTime(newtimems);
    var time = newdate.getFullYear() + "年" + (newdate.getMonth()+1) + "月" + newdate.getDate()+"日 ";
    return time;
}
var x = document.getElementsByClassName("outdated");
if (x.length==1)
{
  var y1=x[0].textContent;
  var y=y1.search("天前");
  var daystring= y1.substring(8,y-1);
  var d=parseInt(daystring);
  var date1=AddDays(d);
  var a=y1.substring(0,8)+date1+y1.substring(y+2,y1.length);
  x[0].textContent=a;
}