404.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="shortcut icon" href="images/error-favicon.ico" type="image/x-icon">
    <link rel="icon" href="images/error-favicon.svg" type="image/svg+xml">

    <title>404 Error</title>
</head>
<body>
    <h1>Opps!</h1>
    <p class="desc">The page is 404 error. <a onclick="moreInfo()" href="more"></a></p>
    <button onclick="fixError()" accesskey="F" data-key="F-E" role="dialog">Fix error</button>
    <button onclick="showDialogs()" accesskey="S" data-key="S-D" role="dialog">Show dialogs</button>
    <object style="display: none;" data="404.swf" type="application/x-shockwave-flash">
        <embed src="404.swf" type="application/x-shockwave-flash">
    </object>
</body>
</html>