notfound.html Example File

body {
  padding: 3em 0em;
  background: #eeeeee;
hr {
  color: lightgray;
  width: 100%;
img {
  float: left;
  opacity: .8;
#box {
  background: white;
  border: 1px solid lightgray;
  width: 600px;
  padding: 60px;
  margin: auto;
h1 {
  font-size: 130%;
  font-weight: bold;
  border-bottom: 1px solid lightgray;
  margin-left: 48px;
h2 {
  font-size: 100%;
  font-weight: normal;
  border-bottom: 1px solid lightgray;
  margin-left: 48px;
ul {
  font-size: 80%;
  padding-left: 48px;
  margin: 0;
#reloadButton {
  padding-left: 48px;
  <div id="box">
    <img src="data:image/png;base64,IMAGE_BINARY_DATA_HERE" width="32" height="32"/>
    <h2>When connecting to: %3.</h2>
      <li>Check the address for errors such as <b>ww</b>
      instead of <b>www</b></li>
      <li>If the address is correct, try checking the network
      <li>If your computer or network is protected by a firewall or
      proxy, make sure that the browser demo is permitted to access
      the network.</li>

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