html, body, .err404
{
  background: #000000;
  color: #FFFFFF;
  height: 100%;
  margin: 0;
}

h1
{
  display: none;
}

.err404
{
  height: 100%;
  background: url(images/err404.png) no-repeat center center fixed;
}

.err403
{
  height: 100%;
  background: url(images/err403.png) no-repeat center center fixed;
}

.footer
{
   position: fixed;
   bottom: 0;
   left: 0;
   right: 0;
   text-align: center;
   font-size: medium;
}