Untitled

<HTML>
<HEAD>
<TITLE>KIT Homepage </TITLE>
</HEAD>

<body>
  <h1 style = "text-align:center">Profibilder des KIT</h1>
  <?
  session_start();
  $_SESSION['index'] = ((isset($_SESSION['index'])) ? $_SESSION['index'] : 0);
  if(isset($_GET['add'])){
       $_SESSION['index']++;
       $_SESSION['index'] = $_SESSION['index']%10;
  }
  ?>
  <form action="<? echo $_SERVER['PHP_SELF']; ?>" method="get">
  <input type="submit" name="add" value="add" />
  </form>
  <?
  $index2 = '<img src="KitPortraits/photo' . $_SESSION['index'] . '.jpg"';
  echo $index2;
  ?>
</body>

<HTML>