hidden }
    div.blur {
      position: absolute;
      width: 2000px;
      height: 2010px;
      top: -1000px; /* places 1000px both above and below container */
      left: -2000px; /* places right edge at left of container */
      box-shadow: 300px 0 100px black;
    }
  </style>
 </head>
 <body>
  <p>The following test should contain three grayscale stripes, each 10
  pixels tall, with no space between them, but all enclosed within a
  blue border.  At all points, the middle stripe must be <strong>the