gistfile1.js

// ==UserScript==
// @name           termtter_user_checker
// @namespace      http://jugyo.org/
// @include        http://tweetrush.com/byclientdata/gettotdaytopclientusers/1303/*
// @description    Let's visit http://tweetrush.com/byclientdata/gettotdaytopclientusers/1303/395
// ==/UserScript==

(function() {
  /* source: http://www.hoge256.net/2007/08/64.html */
  function computeDate(year, month, day, addDays) {
      var dt = new Date(year, month - 1, day);
      var baseSec = dt.getTime();
      var addSec = addDays * 86400000;//日数 * 1日のミリ秒数
      var targetSec = baseSec + addSec;
      dt.setTime(targetSec);
      return dt;
  }

  var elems = document.getElementsByTagName('a');
  for (var i = 0; i < elems.length; i++) {
    var elem = elems[i];
    elem.href = elem.href.replace('tweetrush', 'twitter');
  }

  var num = self.location.href.match(/\d+$/);
  var next = self.location.href.replace(num, (parseInt(num) + 1).toString());
  var prev = self.location.href.replace(num, (parseInt(num) - 1).toString());

  var date = computeDate(2009, 3, 16, parseInt(num) - 464)
  var date_text = date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + date.getDate();

  document.body.innerHTML = '<div style="color: gray; border-bottom: 1px silver solid;">' + 
    '<a href="' + prev + '">prev</a>' + 
    ' | <a href="' + next + '">next</a> (' + date_text + ')' + 
    '</div>' + document.body.innerHTML;
})();