JSFiddle - React, Tailwind, and code Playground

http://stackoverflow.com/questions/7223196/css-problem-with-background-attachmentfixed

HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-gb" lang="en-gb" >
<head>
   <base href="http://esn.teipir.gr/" />
  <meta http-equiv="content-type" content="text/html; charset=utf-8" />
  <meta name="robots" content="index, follow" />
  <meta name="keywords" content="joomla, Joomla" />
  <meta name="description" content="Joomla! - the dynamic portal engine and content management system" />
  <meta name="generator" content="Joomla! 1.5 - Open Source Content Management" />
  <title>Welcome to the Frontpage</title>

  <link href="/index.php?format=feed&amp;type=rss" rel="alternate" type="application/rss+xml" title="RSS 2.0" />
  <link href="/index.php?format=feed&amp;type=atom" rel="alternate" type="application/atom+xml" title="Atom 1.0" />
  <link href="/templates/esnteiofpiraeus/favicon.ico" rel="shortcut icon" type="image/x-icon" />
  <script type="text/javascript" src="/media/system/js/mootools.js"></script>
  <script type="text/javascript" src="/media/system/js/caption.js"></script>

 <link rel="stylesheet" href="/templates/system/css/system.css" type="text/css" />
 <link rel="stylesheet" href="/templates/system/css/general.css" type="text/css" />

 <link rel="stylesheet" type="text/css" href="/templates/esnteiofpiraeus/css/template.css" media="screen" />
 <!--[if IE 6]><link rel="stylesheet" href="/templates/esnteiofpiraeus/css/template.ie6.css" type="text/css" media="screen" /><![endif]-->
 <!--[if IE 7]><link rel="stylesheet" href="/templates/esnteiofpiraeus/css/template.ie7.css" type="text/css" media="screen" /><![endif]-->
 <script type="text/javascript" src="/templates/esnteiofpiraeus/jquery.js"></script>
 <script type="text/javascript">jQuery.noConflict();</script>
 <script type="text/javascript" src="/templates/esnteiofpiraeus/faded.js"></script>   
 <script type="text/javascript"...

CSS

div.backgroundboxleft {
    background-image: url('http://sensoahelp.be/test/Testbeeld.jpg');
    background-attachment: fixed;
    background-position: 0 44px;
    background-repeat: no-repeat;
}

div.backgroundboxright {
    background-image: url('http://sensoahelp.be/test/Testbeeld.jpg');
    background-attachment: fixed;
    background-position: 1323px 44px;
    background-repeat: no-repeat;
}