开心网超级大亨：记录各种产品的价格并显示。

kaixin001-rich.user.js

// ==UserScript==
// @name           开心网超级大亨
// @namespace      kaixin001.app.rich
// @description    记录开心网超级大亨各种产品的价格
// @include        http://www.kaixin001.com/!rich/*
// ==/UserScript==

function parse_number(num) {
  var unit = 1;
  if (num.match(/万元/)) {
    unit = 10000.0;
  } else if (num.match(/亿元/)) {
    unit = 100000000.0;
  }
  return parseFloat(num.replace(/[万亿]?元/g, '')) * unit;
}

function sort_price(a , b) {
  return parse_number(a) - parse_number(b);
}

function save_history(name, price) {
  var history, i;
  var key = 'price.' + name;

  var saved = GM_getValue(key, null);
  if (saved != null) {
    history = saved.split(':');
    var found = false;
    for (i = 0; i < history.length; i++) {
      if (history[i] == price) {
        found = true;
        break;
      }
    }
    if (!found) {
      history.push(price);
    }
    history.sort(sort_price);
    saved = history.join(':');
  } else {
    saved = price;
    history = [price];
  }
  GM_setValue(key, saved);

  return history;
}

function show_history_price(product) {
  var nes = product.getElementsByClassName('mt5');
  var name = nes[0].textContent;
  var pes = product.getElementsByClassName('mb10');
  var price = pes[0].textContent;

  var history = save_history(name, price);
  //GM_log(name + ' - ' + history);

  // 价格范围
  var range = history[0];
  if (history.length > 1) {
    range += '-' + history[history.length - 1];
  }
  range = range.replace(/[万亿]?元/g, '');

  // 根据当前价格和最高价计算利润率，超过5%的用绿色，超过10%的用蓝色，
  // 超过20%的用红色
  var color = 'black';
  price = parseFloat(price);
  var highprice = parseFloat(history[history.length - 1].replace(/[万亿]?元/g, ''));
  var profit = (highprice - price) * 100 / price;
  if (profit > 20) {
    color = 'red';
  } else if (profit > 10) {
    color = 'blue';
  } else if (profit > 5) {
    color = 'green';
  }
  range = ' <span style="float: none; margin: 0; color: ' + color + '">(' + range + ')</span>';

  nes[0].innerHTML += range;
  var title = ['历史价格：', history.join('，'),
               '；涨价空间：', Math.round((highprice - price) * 100) / 100,
               '(', Math.round(profit), '%)'];
  product.setAttribute('title', title.join(''));
}

function check_my_asset(product) {
  var t, lis;
  var name, profit, buyprice;

  lis = product.getElementsByTagName('li');
  t = lis[1].getElementsByTagName('b');
  name = t[0].textContent;
  t = lis[4].getElementsByTagName('em');
  profit = parse_number(t[0].textContent);
  t = lis[2].getElementsByTagName('em');
  buyprice = parse_number(t[0].textContent);
  //GM_log(name + '收益和买入价:' + profit + ' ' + buyprice);

  if ((profit * 100.0 / buyprice) > maxprofit) {
    maxprofit = profit * 100.0 / buyprice;
  }
  //GM_log("当前最大收益:" + maxprofit);
}

function play_sound() {
  document.getElementById('head_msgsound_div').innerHTML = '<embed width="1" height="1" flashvars="autoplay=0" menu="false" wmode="opaque" allowscriptaccess="always" quality="high" bgcolor="#ffffff" name="newmsg_sound_swf" id="newmsg_sound_swf" src="http://img1.kaixin001.com.cn/i2/newmsg_sound.1.0.swf" type="application/x-shockwave-flash"/>';
}

var curpage = document.getElementById('nav').getElementsByClassName('curr');

if (curpage[0].textContent == '购买资产') {
  // 查找商品价格和名称，并显示出来
  var products = document.getElementById('r2_2a').getElementsByTagName('ul');
  Array.filter(products, show_history_price);

  // 修改页面标题
  var nav_bg = document.getElementsByClassName('nav_bg');
  var tabelem = nav_bg[0].getElementsByClassName('curr');
  document.title = [tabelem[0].textContent, document.title].join(' - ');
}

else if (curpage[0].textContent == '我的资产') {
  // 查看商品的收益，到达一定程度则修改页面标题并播放声音
  var t = document.getElementsByClassName('list_zc');
  var products = t[0].getElementsByTagName('ul');
  var maxprofit = 0;
  Array.filter(products, check_my_asset);

  // 修改页面标题
  if (maxprofit >= 25.0) {
    document.title = ['赶快卖！', document.title].join(' - ');
    play_sound();
  } else if (maxprofit >= 10.0) {
    document.title = ['涨价啦！', document.title].join(' - ');
  } else {
    document.title = [curpage[0].textContent, document.title].join(' - ');
  }

  // 页面三百秒重新载入一次
  setTimeout('document.location.reload()', 300000);
}