(servlet (page)
  (case page
    ((#null) 
       {<h1>multipage.servlet</h1>
          this servlet contains several pages:
         Just add "?page=XXXX" to the end of the URL and hit the enter key
         to go to the specified page, where XXXX is one of the following:
        <ul>
           <li>a</li> <li>b</li> <li>brandeis</li> <li>japan</li><li>form</li>
        </ul>
        If you want you can use a <a href="multipage.servlet?page=form">
         form</a> to select which page to visit.
     })
    (("a") {This is the first page})
    (("b") {This is the second page})
    (("brandeis") {This page is for people who like Brandeis})
    (("japan") {Konichi-wa! Ii tenki desu, ne?})
    (("XXXX") {You are being too literal! go back and try again.})
    (("form")
     {<h1>Here is a form to select which page to visit</h1>
       <form method="post" action="multipage.servlet">
          <select name="page">
             <option>a</option>
             <option>b</option>
             <option>brandeis</option>
             <option>japan</option>
          </select>
          <br><input type="submit" value="go">
       </form>})
    (else {I don't know about that page!})
  )
)