body {
  font-size: 100.01%;
  font-family: Arial,Helvetica,sans-serif;
  text-align: center;  /* Zentrierung im Internet Explorer */
  margin-top: 0;
  margin-bottom: 20px;  
  background: url(../bilder/hintergrund/2.jpg);
  background-repeat: no-repeat;
  background-position: center top;
  background-attachment: fixed;
}