tted black; }
  </style>
 </head>
 <body>
  <p>This document has a white background overlayed with a fixed-positioned image with a multi-bit alpha channel. In the middle of the page is a square div with a height the size of two tiles, with the same background, also fixed. This should have the effect of darkening the transparent area with the colour splodges.</p>
  <div>
 
</div></body>
</html>
