CSRF

迈不过友情╰ 2022-06-13 23:06 198阅读 0赞

#  #

# 3、CSRF攻击原理 #

那么，上面那段话到底是什么意思呢？我们先来看session的工作机制。

session我想大家都不陌生，无论你用.net、JSP或是PHP开发过网站，都肯定用过它，那么它是如何工作的呢？先问个小问题：如果把浏览器的cookie禁用了，session还能正常工作吗？

答案是否定的，这里举一个简单的类比例子以便理解session：

我买了一张高尔夫俱乐部的会员卡，俱乐部给了我一张带有卡号（session\_id）的会员卡（cookie）。我能享受哪些服务以及我的个人资料（session）都是保存在高尔夫俱乐部的数据库里（web server）。我每次去高尔夫俱乐部只需要出示这张高级会员卡，俱乐部就知道我是谁了，并且为我服务。

我们知道http请求是无状态的，也就是说每次http请求都是独立的无关之前的操作的，但是每次http请求都会将本域下的所有cookie作为http请求头的一部分发送给服务端，所以服务端就根据请求中的cookie存放的sessionid去session对象中找到该会员资料。

理解了session工作机制后，再来看CSRF攻击原理就很容易理解了。我们来看下面这张图：

![153441_s0OE_1451225.jpg][]

我们跟着图中的步骤序号看，这就是一次CSRF攻击。步骤4中，攻击者B要求访问网站A，可以是利用社会工程学里的方法引诱客户端点击恶意链接来完成。例如，若网站A是一个合法购物网站，攻击者B通过构造一个隐藏的购物清单form来引诱客户端点击提交。

# 4、CSRF与XSS的区别 #

为什么说CSRF是隐藏在暗处的蛇呢？我们来对比一下它和XSS的攻击过程：

XSS

攻击者发现XSS漏洞——构造代码——发送给受害人——受害人打开——攻击者获取受害人的cookie——完成攻击

CSRF

攻击者发现CSRF漏洞——构造代码——发送给受害人——受害人打开——受害人执行代码——完成攻击

注意，这里CSRF攻击并没有盗取受害者的cookie，在下面的实例PHP代码中我们可以体验到这一点。

# 5、CSRF攻击案例 #

我们先用PHP做一个User登录界面，然后在后台通过根据session判断用户合法性来提供相应服务。

登录界面index.html

<!DOCTYPE html> <html> <head><meta charset="utf-8"> <title>用户登录</title> </head> <body> <form name="LoginForm" method="post" action="login.php" onSubmit="return InputCheck(this)"> <p> <label for="username" class="label">用户名:</label> <input id="username" name="username" type="text" class="input" /> <p/> <p> <label for="password" class="label">密    码:</label> <input id="password" name="password" type="password" class="input" /> <p/> <p> <input type="submit" name="submit" value=" 确 定 " class="left" /> </p> </form> </body> </html>

处理登录操作login.php

<?php header("Content-Type: text/html;charset=utf-8"); session_start(); if($_GET['action'] == "logout") { unset($_SESSION['username']); echo '注销登录成功！点击此处 <a href="index.html">登录</a>'; exit; } if(!isset($_POST['submit'])){ exit("非法访问!"); } $username = $_POST['username']; $password = $_POST['password']; if($username == 'admin' && $password == 'admin') { $_SESSION['username'] = $username; $_SESSION['password'] = $password; echo $username, '欢迎您！进入 <a href="my.php">用户中心</a><br/>'; echo '点击此处 <a href="login.php?action=logout">注销</a>登录<br/>'; exit; } else { exit('登录失败！点击此处 <a href="index.html">返回</a>'); }

根据session来提供相应服务my.php

<?php header("Content-Type: text/html;charset=utf-8"); session_start(); if($_SESSION['username'] != 'admin') { echo 'Error!'; header("Location:index.html"); exit; } $password = $_SESSION['password']; echo 'PWD:',$password,'<br/>'; ?>

接下来，在恶意网站（可以与合法网站在不同服务器上）构造如下界面

<!DOCTYPE html> <html> <head><meta charset="utf-8"> <title>Hack</title> </head> <body> <a href="http://keyven/csrf/my.php">恶意链接</a> </body> </html>

只要用户（受害者）点击该链接，就完成了一次CSRF攻击，虽然用户可能本身没有执行该操作的意图。

# 6、现实场景意义 #

上面只是简单地给出一个代码案例，现考虑一个具体现实场景，来体会防御CSRF攻击的重要性。

\-----------------------------案例------------------------------  
1、Bob在自己的电脑上登录购物网站A刚买完一本电子书，然后比较无聊就跑到一个公开的BBS上灌水，当他看到一篇“Fu\*k”的帖子，很有兴趣地打开这个帖子想看看内部图片是啥样子的，殊不知，这其实是一个hacker精心设计的骗局。  
2、在这个帖子中确实有几个图片，看上去真的像是S\*x的照片，但是其中有个图片没显示出来，Bob以为是自己网速太慢，导致这个图片没有加载进来，也没在意，点击该帖子中的下一页按钮。  
3、几天后，Bob猛然发现自己在网站A上莫名其妙买了1000元商品，到底是怎么了？

# 7、CSRF攻击的防御 #

目前业界服务器端防御CSRF攻击主要有三种策略：验证HTTP Referer字段，在请求地址中添加token并验证，在HTTP头中自定义属性并验证。下面分别对这三种策略进行简要介绍。

## 7.1 验证HTTP Referer字段 ##

根据HTTP协议，在HTTP头中有一个字段叫Referer，它记录了该HTTP请求的来源地址。在通常情况下，访问一个安全受限页面的请求必须来自于同一个网站。比如某银行的转账是通过用户访问http://bank.test/test?page=10&userID=101&money=10000页面完成，用户必须先登录bank. test，然后通过点击页面上的按钮来触发转账事件。当用户提交请求时，该转账请求的Referer值就会是转账按钮所在页面的URL（本例中，通常是以bank. test域名开头的地址）。而如果攻击者要对银行网站实施CSRF攻击，他只能在自己的网站构造请求，当用户通过攻击者的网站发送请求到银行时，该请求的Referer是指向攻击者的网站。因此，要防御CSRF攻击，银行网站只需要对于每一个转账请求验证其Referer值，如果是以bank. test开头的域名，则说明该请求是来自银行网站自己的请求，是合法的。如果Referer是其他网站的话，就有可能是CSRF攻击，则拒绝该请求。

## 7.2 在请求地址中添加token并验证 ##

CSRF攻击之所以能够成功，是因为攻击者可以伪造用户的请求，该请求中所有的用户验证信息都存在于Cookie中，因此攻击者可以在不知道这些验证信息的情况下直接利用用户自己的Cookie来通过安全验证。由此可知，抵御CSRF攻击的关键在于：在请求中放入攻击者所不能伪造的信息，并且该信息不存在于Cookie之中。鉴于此，系统开发者可以在HTTP请求中以参数的形式加入一个随机产生的token，并在服务器端建立一个拦截器来验证这个token，如果请求中没有token或者token内容不正确，则认为可能是CSRF攻击而拒绝该请求。

## 7.3 在HTTP头中自定义属性并验证 ##

自定义属性的方法也是使用token并进行验证，和前一种方法不同的是，这里并不是把token以参数的形式置于HTTP请求之中，而是把它放到HTTP头中自定义的属性里。通过XMLHttpRequest这个类，可以一次性给所有该类请求加上csrftoken这个HTTP头属性，并把token值放入其中。这样解决了前一种方法在请求中加入token的不便，同时，通过这个类请求的地址不会被记录到浏览器的地址栏，也不用担心token会通过Referer泄露到其他网站。

# 8、CSRF攻击防御的实现：Token #

上面提到，可以通过在请求中添加一个Hacker所不能伪造的Token，并在服务器端建立相应的拦截器进行Token验证。现实现思路主要如下：

1. 要使得Token对于Hacker来说比较难以伪造，我们可以使用伪随机数生成器来构造它，然后把它放到服务器端的session里，并将Token发给用户（注意并没有保存在cookie中）；

2.  当用户提交请求时，服务器端拦截器将POST请求中的Token提取出来，与session中的Token进行比对，相等即执行下一步操作。

代码如下：

步骤1. upload.php

<?php session_start(); $csrf_token = md5(uniqid()); $_SESSION['csrf_token'] = $csrf_token; ?> <form action="download.php" method="post"> <input type="password" name="secret" id="secret"/> <input type="hidden" name="csrf_token" id="csrf_token" value="<?php echo $csrf_token; ?>"/> <input type="submit" name="submit" value="submit"/> </form>

步骤2. download.php

<?php session_start(); if(isset($_SESSION['username']) && $_SESSION['csrf_token']==$_POST['csrf_token']) { echo 'secret:',$_POST['secret'],'!'; } else { echo 'Error!'; } ?>

即同时验证cookie中的sessionid，与POST中的Token。

接下来，在恶意网站（可以与合法网站在不同服务器上）构造如下界面，现在体验一下有什么不同？

<!DOCTYPE html> <html> <head><meta charset="utf-8"> <title>Hack</title> </head> <body> <form action="http://keyven/csrf/secret/download.php" method="post"> <input type="password" name="secret" id="secret"/> <input type="submit" name="submit" value="submit"/> </form> </body> </html>

## CSRF 背景与介绍 ##

CSRF（Cross Site Request Forgery, 跨站域请求伪造）是一种网络的攻击方式，它在 2007 年曾被列为互联网 20 大安全隐患之一。其他安全隐患，比如 SQL 脚本注入，跨站域脚本攻击等在近年来已经逐渐为众人熟知，很多网站也都针对他们进行了防御。然而，对于大多数人来说，CSRF 却依然是一个陌生的概念。即便是大名鼎鼎的 Gmail, 在 2007 年底也存在着 CSRF 漏洞，从而被黑客攻击而使 Gmail 的用户造成巨大的损失。

### CSRF 攻击实例 ###

CSRF 攻击可以在受害者毫不知情的情况下以受害者名义伪造请求发送给受攻击站点，从而在并未授权的情况下执行在权限保护之下的操作。比如说，受害者 Bob 在银行有一笔存款，通过对银行的网站发送请求 http://bank.example/withdraw?account=bob&amount=1000000&for=bob2可以使 Bob 把 1000000 的存款转到 bob2 的账号下。通常情况下，该请求发送到网站后，服务器会先验证该请求是否来自一个合法的 session，并且该 session 的用户 Bob 已经成功登陆。黑客 Mallory 自己在该银行也有账户，他知道上文中的 URL 可以把钱进行转帐操作。Mallory 可以自己发送一个请求给银行：http://bank.example/withdraw?account=bob&amount=1000000&for=Mallory。但是这个请求来自 Mallory 而非 Bob，他不能通过安全认证，因此该请求不会起作用。

这时，Mallory 想到使用 CSRF 的攻击方式，他先自己做一个网站，在网站中放入如下代码： src=”http://bank.example/withdraw?account=bob&amount=1000000&for=Mallory ”，并且通过广告等诱使 Bob 来访问他的网站。当 Bob 访问该网站时，上述 url 就会从 Bob 的浏览器发向银行，而这个请求会附带 Bob 浏览器中的 cookie 一起发向银行服务器。大多数情况下，该请求会失败，因为他要求 Bob 的认证信息。但是，如果 Bob 当时恰巧刚访问他的银行后不久，他的浏览器与银行网站之间的 session 尚未过期，浏览器的 cookie 之中含有 Bob 的认证信息。这时，悲剧发生了，这个 url 请求就会得到响应，钱将从 Bob 的账号转移到 Mallory 的账号，而 Bob 当时毫不知情。等以后 Bob 发现账户钱少了，即使他去银行查询日志，他也只能发现确实有一个来自于他本人的合法请求转移了资金，没有任何被攻击的痕迹。而 Mallory 则可以拿到钱后逍遥法外。

### CSRF 攻击的对象 ###

在讨论如何抵御 CSRF 之前，先要明确 CSRF 攻击的对象，也就是要保护的对象。从以上的例子可知，CSRF 攻击是黑客借助受害者的 cookie 骗取服务器的信任，但是黑客并不能拿到 cookie，也看不到 cookie 的内容。另外，对于服务器返回的结果，由于浏览器同源策略的限制，黑客也无法进行解析。因此，黑客无法从返回的结果中得到任何东西，他所能做的就是给服务器发送请求，以执行请求中所描述的命令，在服务器端直接改变数据的值，而非窃取服务器中的数据。所以，我们要保护的对象是那些可以直接产生数据改变的服务，而对于读取数据的服务，则不需要进行 CSRF 的保护。比如银行系统中转账的请求会直接改变账户的金额，会遭到 CSRF 攻击，需要保护。而查询余额是对金额的读取操作，不会改变数据，CSRF 攻击无法解析服务器返回的结果，无需保护。

## 当前防御 CSRF 的几种策略 ##

在业界目前防御 CSRF 攻击主要有三种策略：验证 HTTP Referer 字段；在请求地址中添加 token 并验证；在 HTTP 头中自定义属性并验证。下面就分别对这三种策略进行详细介绍。

### 验证 HTTP Referer 字段 ###

根据 HTTP 协议，在 HTTP 头中有一个字段叫 Referer，它记录了该 HTTP 请求的来源地址。在通常情况下，访问一个安全受限页面的请求来自于同一个网站，比如需要访问 http://bank.example/withdraw?account=bob&amount=1000000&for=Mallory，用户必须先登陆 bank.example，然后通过点击页面上的按钮来触发转账事件。这时，该转帐请求的 Referer 值就会是转账按钮所在的页面的 URL，通常是以 bank.example 域名开头的地址。而如果黑客要对银行网站实施 CSRF 攻击，他只能在他自己的网站构造请求，当用户通过黑客的网站发送请求到银行时，该请求的 Referer 是指向黑客自己的网站。因此，要防御 CSRF 攻击，银行网站只需要对于每一个转账请求验证其 Referer 值，如果是以 bank.example 开头的域名，则说明该请求是来自银行网站自己的请求，是合法的。如果 Referer 是其他网站的话，则有可能是黑客的 CSRF 攻击，拒绝该请求。

这种方法的显而易见的好处就是简单易行，网站的普通开发人员不需要操心 CSRF 的漏洞，只需要在最后给所有安全敏感的请求统一增加一个拦截器来检查 Referer 的值就可以。特别是对于当前现有的系统，不需要改变当前系统的任何已有代码和逻辑，没有风险，非常便捷。

然而，这种方法并非万无一失。Referer 的值是由浏览器提供的，虽然 HTTP 协议上有明确的要求，但是每个浏览器对于 Referer 的具体实现可能有差别，并不能保证浏览器自身没有安全漏洞。使用验证 Referer 值的方法，就是把安全性都依赖于第三方（即浏览器）来保障，从理论上来讲，这样并不安全。事实上，对于某些浏览器，比如 IE6 或 FF2，目前已经有一些方法可以篡改 Referer 值。如果 bank.example 网站支持 IE6 浏览器，黑客完全可以把用户浏览器的 Referer 值设为以 bank.example 域名开头的地址，这样就可以通过验证，从而进行 CSRF 攻击。

即便是使用最新的浏览器，黑客无法篡改 Referer 值，这种方法仍然有问题。因为 Referer 值会记录下用户的访问来源，有些用户认为这样会侵犯到他们自己的隐私权，特别是有些组织担心 Referer 值会把组织内网中的某些信息泄露到外网中。因此，用户自己可以设置浏览器使其在发送请求时不再提供 Referer。当他们正常访问银行网站时，网站会因为请求没有 Referer 值而认为是 CSRF 攻击，拒绝合法用户的访问。

### 在请求地址中添加 token 并验证 ###

CSRF 攻击之所以能够成功，是因为黑客可以完全伪造用户的请求，该请求中所有的用户验证信息都是存在于 cookie 中，因此黑客可以在不知道这些验证信息的情况下直接利用用户自己的 cookie 来通过安全验证。要抵御 CSRF，关键在于在请求中放入黑客所不能伪造的信息，并且该信息不存在于 cookie 之中。可以在 HTTP 请求中以参数的形式加入一个随机产生的 token，并在服务器端建立一个拦截器来验证这个 token，如果请求中没有 token 或者 token 内容不正确，则认为可能是 CSRF 攻击而拒绝该请求。

这种方法要比检查 Referer 要安全一些，token 可以在用户登陆后产生并放于 session 之中，然后在每次请求时把 token 从 session 中拿出，与请求中的 token 进行比对，但这种方法的难点在于如何把 token 以参数的形式加入请求。对于 GET 请求，token 将附在请求地址之后，这样 URL 就变成 http://url?csrftoken=tokenvalue。 而对于 POST 请求来说，要在 form 的最后加上 <input type=”hidden” name=”csrftoken” value=”tokenvalue”/>，这样就把 token 以参数的形式加入请求了。但是，在一个网站中，可以接受请求的地方非常多，要对于每一个请求都加上 token 是很麻烦的，并且很容易漏掉，通常使用的方法就是在每次页面加载时，使用 javascript 遍历整个 dom 树，对于 dom 中所有的 a 和 form 标签后加入 token。这样可以解决大部分的请求，但是对于在页面加载之后动态生成的 html 代码，这种方法就没有作用，还需要程序员在编码时手动添加 token。

该方法还有一个缺点是难以保证 token 本身的安全。特别是在一些论坛之类支持用户自己发表内容的网站，黑客可以在上面发布自己个人网站的地址。由于系统也会在这个地址后面加上 token，黑客可以在自己的网站上得到这个 token，并马上就可以发动 CSRF 攻击。为了避免这一点，系统可以在添加 token 的时候增加一个判断，如果这个链接是链到自己本站的，就在后面添加 token，如果是通向外网则不加。不过，即使这个 csrftoken 不以参数的形式附加在请求之中，黑客的网站也同样可以通过 Referer 来得到这个 token 值以发动 CSRF 攻击。这也是一些用户喜欢手动关闭浏览器 Referer 功能的原因。

### 在 HTTP 头中自定义属性并验证 ###

这种方法也是使用 token 并进行验证，和上一种方法不同的是，这里并不是把 token 以参数的形式置于 HTTP 请求之中，而是把它放到 HTTP 头中自定义的属性里。通过 XMLHttpRequest 这个类，可以一次性给所有该类请求加上 csrftoken 这个 HTTP 头属性，并把 token 值放入其中。这样解决了上种方法在请求中加入 token 的不便，同时，通过 XMLHttpRequest 请求的地址不会被记录到浏览器的地址栏，也不用担心 token 会透过 Referer 泄露到其他网站中去。

然而这种方法的局限性非常大。XMLHttpRequest 请求通常用于 Ajax 方法中对于页面局部的异步刷新，并非所有的请求都适合用这个类来发起，而且通过该类请求得到的页面不能被浏览器所记录下，从而进行前进，后退，刷新，收藏等操作，给用户带来不便。另外，对于没有进行 CSRF 防护的遗留系统来说，要采用这种方法来进行防护，要把所有请求都改为 XMLHttpRequest 请求，这样几乎是要重写整个网站，这代价无疑是不能接受的。

## Java 代码示例 ##

下文将以 Java 为例，对上述三种方法分别用代码进行示例。无论使用何种方法，在服务器端的拦截器必不可少，它将负责检查到来的请求是否符合要求，然后视结果而决定是否继续请求或者丢弃。在 Java 中，拦截器是由 Filter 来实现的。我们可以编写一个 Filter，并在 web.xml 中对其进行配置，使其对于访问所有需要 CSRF 保护的资源的请求进行拦截。

在 filter 中对请求的 Referer 验证代码如下

##### 清单 1. 在 Filter 中验证 Referer #####

以上代码先取得 Referer 值，然后进行判断，当其非空并以 bank.example 开头时，则继续请求，否则的话可能是 CSRF 攻击，转到 error.jsp 页面。

如果要进一步验证请求中的 token 值，代码如下

##### 清单 2. 在 filter 中验证请求中的 token #####

首先判断 session 中有没有 csrftoken，如果没有，则认为是第一次访问，session 是新建立的，这时生成一个新的 token，放于 session 之中，并继续执行请求。如果 session 中已经有 csrftoken，则说明用户已经与服务器之间建立了一个活跃的 session，这时要看这个请求中有没有同时附带这个 token，由于请求可能来自于常规的访问或是 XMLHttpRequest 异步访问，我们分别尝试从请求中获取 csrftoken 参数以及从 HTTP 头中获取 csrftoken 自定义属性并与 session 中的值进行比较，只要有一个地方带有有效 token，就判定请求合法，可以继续执行，否则就转到错误页面。生成 token 有很多种方法，任何的随机算法都可以使用，Java 的 UUID 类也是一个不错的选择。

除了在服务器端利用 filter 来验证 token 的值以外，我们还需要在客户端给每个请求附加上这个 token，这是利用 js 来给 html 中的链接和表单请求地址附加 csrftoken 代码，其中已定义 token 为全局变量，其值可以从 session 中得到。

##### 清单 3. 在客户端对于请求附加 token #####

<table style="border-collapse:collapse; width:940px; margin:0px 0px 30px!important; padding:0px!important; vertical-align:baseline!important; background:none!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"> 
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  <tr style="margin:0px!important; padding:0px!important; vertical-align:baseline!important; background:none!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important"> 
   <td style="margin:0px!important; padding:0px!important; vertical-align:baseline!important; background:none!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important; color:rgb(112,112,112)!important"> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
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    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
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    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
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     <span style="font-size:12px">25</span> 
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    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">26</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">27</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">28</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">29</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">30</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">31</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">32</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">33</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">34</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">35</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">36</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">37</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">38</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">39</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">40</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">41</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">42</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">43</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">44</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">45</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">46</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">47</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">48</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">49</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">50</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">51</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">52</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">53</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">54</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">55</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">56</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">57</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">58</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">59</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">60</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">61</span> 
    </div> 
    <div style="margin:0px!important; padding:0px 0.5em 0px 1em!important; border-width:0px 3px 0px 0px!important; border-top-style:initial!important; border-right-style:solid!important; border-bottom-style:initial!important; border-left-style:initial!important; border-top-color:initial!important; border-right-color:rgb(0,118,112)!important; border-bottom-color:initial!important; border-left-color:initial!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
     <span style="font-size:12px">62</span> 
    </div> </td> 
   <td style="width:895px; margin:0px!important; padding:0px!important; vertical-align:baseline!important; background:none!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"> 
    <div style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:relative!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important"> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">function appendToken(){ </span></code> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">updateForms();</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">updateTags();</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">}</span></code> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">function updateForms() { </span></code> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">// 得到页面中所有的 form 元素</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var forms = document.getElementsByTagName('form'); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">for(i=0; i&lt;forms.length; i++) { </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var url = forms[i].action; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">// 如果这个 form 的 action 值为空，则不附加 csrftoken </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">if(url == null || url == "" ) continue; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">// 动态生成 input 元素，加入到 form 之后</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var e = document.createElement("input"); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">e.name = "csrftoken"; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">e.value = token; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">e.type="hidden";</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">forms[i].appendChild(e);</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">}</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">}</span></code> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">function updateTags() { </span></code> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var all = document.getElementsByTagName('a'); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var len = all.length; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">// 遍历所有 a 元素</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">for(var i=0; i&lt;len; i++) { </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var e = all[i]; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">updateTag(e, 'href', token); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">}</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">}</span></code> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">function updateTag(element, attr, token) { </span></code> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var location = element.getAttribute(attr); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">if(location != null &amp;&amp; location != '' '' ) { </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var fragmentIndex = location.indexOf('#'); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var fragment = null; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">if(fragmentIndex != -1){ </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">//url 中含有只相当页的锚标记</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">fragment = location.substring(fragmentIndex); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">location = location.substring(0,fragmentIndex); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">}</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">var index = location.indexOf('?'); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px">&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">if(index != -1) { </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">//url 中已含有其他参数</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">location = location + '&amp;csrftoken=' + token; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">} else { </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">//url 中没有其他参数</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">location = location + '?csrftoken=' + token; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">}</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">if(fragment != null){ </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">location += fragment; </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">}</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">element.setAttribute(attr, location); </code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <span style="font-size:12px"><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">&nbsp;&nbsp;&nbsp;</code><code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important">}</code></span> 
     </div> 
     <div style="margin:0px!important; padding:0px 1em!important; border:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 
      <code style="margin:0px!important; padding:0px!important; border:0px!important; vertical-align:baseline!important; background:none!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.2em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,&quot;Bitstream Vera Sans Mono&quot;,&quot;Courier New&quot;,Courier,monospace!important; min-height:inherit!important"><span style="font-size:12px">}</span></code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

在客户端 html 中，主要是有两个地方需要加上 token，一个是表单 form，另一个就是链接 a。这段代码首先遍历所有的 form，在 form 最后添加一隐藏字段，把 csrftoken 放入其中。然后，代码遍历所有的链接标记 a，在其 href 属性中加入 csrftoken 参数。注意对于 a.href 来说，可能该属性已经有参数，或者有锚标记。因此需要分情况讨论，以不同的格式把 csrftoken 加入其中。

如果你的网站使用 XMLHttpRequest，那么还需要在 HTTP 头中自定义 csrftoken 属性，利用 dojo.xhr 给 XMLHttpRequest 加上自定义属性代码如下：

##### 清单 4. 在 HTTP 头中自定义属性 #####

这里改写了 dojo.xhr 的方法，首先确保 dojo.xhr 中存在 HTTP 头，然后在 args.headers 中添加 csrftoken 字段，并把 token 值从 session 里拿出放入字段中。

## CSRF 防御方法选择之道 ##

通过上文讨论可知，目前业界应对 CSRF 攻击有一些克制方法，但是每种方法都有利弊，没有一种方法是完美的。如何选择合适的方法非常重要。如果网站是一个现有系统，想要在最短时间内获得一定程度的 CSRF 的保护，那么验证 Referer 的方法是最方便的，要想增加安全性的话，可以选择不支持低版本浏览器，毕竟就目前来说，IE7+, FF3+ 这类高版本浏览器的 Referer 值还无法被篡改。

如果系统必须支持 IE6，并且仍然需要高安全性。那么就要使用 token 来进行验证，在大部分情况下，使用 XmlHttpRequest 并不合适，token 只能以参数的形式放于请求之中，若你的系统不支持用户自己发布信息，那这种程度的防护已经足够，否则的话，你仍然难以防范 token 被黑客窃取并发动攻击。在这种情况下，你需要小心规划你网站提供的各种服务，从中间找出那些允许用户自己发布信息的部分，把它们与其他服务分开，使用不同的 token 进行保护，这样可以有效抵御黑客对于你关键服务的攻击，把危害降到最低。毕竟，删除别人一个帖子比直接从别人账号中转走大笔存款严重程度要轻的多。

如果是开发一个全新的系统，则抵御 CSRF 的选择要大得多。笔者建议对于重要的服务，可以尽量使用 XMLHttpRequest 来访问，这样增加 token 要容易很多。另外尽量避免在 js 代码中使用复杂逻辑来构造常规的同步请求来访问需要 CSRF 保护的资源，比如 window.location 和 document.createElement(“a”) 之类，这样也可以减少在附加 token 时产生的不必要的麻烦。

最后，要记住 CSRF 不是黑客唯一的攻击手段，无论你 CSRF 防范有多么严密，如果你系统有其他安全漏洞，比如跨站域脚本攻击 XSS，那么黑客就可以绕过你的安全防护，展开包括 CSRF 在内的各种攻击，你的防线将如同虚设。

## 总结与展望 ##

可见，CSRF 是一种危害非常大的攻击，又很难以防范。目前几种防御策略虽然可以很大程度上抵御 CSRF 的攻击，但并没有一种完美的解决方案。一些新的方案正在研究之中，比如对于每次请求都使用不同的动态口令，把 Referer 和 token 方案结合起来，甚至尝试修改 HTTP 规范，但是这些新的方案尚不成熟，要正式投入使用并被业界广为接受还需时日。在这之前，我们只有充分重视 CSRF，根据系统的实际情况选择最合适的策略，这样才能把 CSRF 的危害降到最低。

# 预防CSRF攻击 #

## 什么是CSRF ##

CSRF（Cross-site request forgery），中文名称：跨站请求伪造，也被称为：one click attack/session riding，缩写为：CSRF/XSRF。

那么CSRF到底能够干嘛呢？你可以这样简单的理解：攻击者可以盗用你的登陆信息，以你的身份模拟发送各种请求。攻击者只要借助少许的社会工程学的诡计，例如通过QQ等聊天软件发送的链接(有些还伪装成短域名，用户无法分辨)，攻击者就能迫使Web应用的用户去执行攻击者预设的操作。例如，当用户登录网络银行去查看其存款余额，在他没有退出时，就点击了一个QQ好友发来的链接，那么该用户银行帐户中的资金就有可能被转移到攻击者指定的帐户中。

所以遇到CSRF攻击时，将对终端用户的数据和操作指令构成严重的威胁；当受攻击的终端用户具有管理员帐户的时候，CSRF攻击将危及整个Web应用程序。

## CSRF的原理 ##

下图简单阐述了CSRF攻击的思想

[![9.1.csrf.png_raw_true][]][9.1.csrf.png_raw_true 1]

图9.1 CSRF的攻击过程

从上图可以看出，要完成一次CSRF攻击，受害者必须依次完成两个步骤 ：

*  1.登录受信任网站A，并在本地生成Cookie 。
 *  2.在不退出A的情况下，访问危险网站B。

看到这里，读者也许会问：“如果我不满足以上两个条件中的任意一个，就不会受到CSRF的攻击”。是的，确实如此，但你不能保证以下情况不会发生：

*  你不能保证你登录了一个网站后，不再打开一个tab页面并访问另外的网站，特别现在浏览器都是支持多tab的。
 *  你不能保证你关闭浏览器了后，你本地的Cookie立刻过期，你上次的会话已经结束。
 *  上图中所谓的攻击网站，可能是一个存在其他漏洞的可信任的经常被人访问的网站。

因此对于用户来说很难避免在登陆一个网站之后不点击一些链接进行其他操作，所以随时可能成为CSRF的受害者。

CSRF攻击主要是因为Web的隐式身份验证机制，Web的身份验证机制虽然可以保证一个请求是来自于某个用户的浏览器，但却无法保证该请求是用户批准发送的。

## 如何预防CSRF ##

过上面的介绍，读者是否觉得这种攻击很恐怖，意识到恐怖是个好事情，这样会促使你接着往下看如何改进和防止类似的漏洞出现。

CSRF的防御可以从服务端和客户端两方面着手，防御效果是从服务端着手效果比较好，现在一般的CSRF防御也都在服务端进行。

服务端的预防CSRF攻击的方式方法有多种，但思想上都是差不多的，主要从以下2个方面入手：

*  1、正确使用GET,POST和Cookie；
 *  2、在非GET请求中增加伪随机数；

我们上一章介绍过REST方式的Web应用，一般而言，普通的Web应用都是以GET、POST为主，还有一种请求是Cookie方式。我们一般都是按照如下方式设计应用：

1、GET常用在查看，列举，展示等不需要改变资源属性的时候；

2、POST常用在下达订单，改变一个资源的属性或者做其他一些事情；

接下来我就以Go语言来举例说明，如何限制对资源的访问方法：

mux.Get("/user/:uid", getuser)
    	mux.Post("/user/:uid", modifyuser)

这样处理后，因为我们限定了修改只能使用POST，当GET方式请求时就拒绝响应，所以上面图示中GET方式的CSRF攻击就可以防止了，但这样就能全部解决问题了吗？当然不是，因为POST也是可以模拟的。

因此我们需要实施第二步，在非GET方式的请求中增加随机数，这个大概有三种方式来进行：

*  为每个用户生成一个唯一的cookie token，所有表单都包含同一个伪随机值，这种方案最简单，因为攻击者不能获得第三方的Cookie(理论上)，所以表单中的数据也就构造失败，但是由于用户的Cookie很容易由于网站的XSS漏洞而被盗取，所以这个方案必须要在没有XSS的情况下才安全。
 *  每个请求使用验证码，这个方案是完美的，因为要多次输入验证码，所以用户友好性很差，所以不适合实际运用。
 *  不同的表单包含一个不同的伪随机值，我们在4.4小节介绍“如何防止表单多次递交”时介绍过此方案，复用相关代码，实现如下：

生成随机数token

h := md5.New()
    	io.WriteString(h, strconv.FormatInt(crutime, 10))
    	io.WriteString(h, "ganraomaxxxxxxxxx")
    	token := fmt.Sprintf("%x", h.Sum(nil))
    
    	t, _ := template.ParseFiles("login.gtpl")
    	t.Execute(w, token)

输出token

验证token

r.ParseForm()
    	token := r.Form.Get("token")
    	if token != "" {
    		//验证token的合法性
    	} else {
    		//不存在token报错
    	}

这样基本就实现了安全的POST，但是也许你会说如果破解了token的算法呢，按照理论上是，但是实际上破解是基本不可能的，因为有人曾计算过，暴力破解该串大概需要2的11次方时间。

## 总结 ##

跨站请求伪造，即CSRF，是一种非常危险的Web安全威胁，它被Web安全界称为“沉睡的巨人”，其威胁程度由此“美誉”便可见一斑。本小节不仅对跨站请求伪造本身进行了简单介绍，还详细说明造成这种漏洞的原因所在，然后以此提了一些防范该攻击的建议，希望对读者编写安全的Web应用能够有所启发。

[153441_s0OE_1451225.jpg]: https://static.oschina.net/uploads/space/2017/0120/153441_s0OE_1451225.jpg
[9.1.csrf.png_raw_true]: /images/20220614/a278f5d1059e48d68a2769e835331052.png
[9.1.csrf.png_raw_true 1]: https://github.com/astaxie/build-web-application-with-golang/blob/master/zh/images/9.1.csrf.png?raw=true