title: How to avoid "Web page has expired" in IE
body: <p>I have a page with a form.
  When I post the form, then I click the <em>previous button</em> in IE, I have an error : "<strong>The web page has expired</strong>"</p>
  
  <p>As I seen it <a href="https://stackoverflow.com/questions/12403589/how-to-avoid-internet-explorers-webpage-has-expired-when-using-the-back-butto">in this post</a>, I tried :</p>
  
  <pre><code>&lt;meta http-equiv="Cache-Control" content="no-store, no-cache, must-revalidate, post-check=0, pre-check=0"&gt;
  &lt;meta http-equiv="Pragma" content="no-cache"&gt;
  </code></pre>
  
  <p>Now, I don't have the expired message anymore, but the <strong>form just auto revalidate</strong>. When I click the previous button, I see I go back to my form page, then I just return to the result page.</p>
  
  <p>Did I do something wrong? I don't understand much in <code>Cache-Control</code> and such.</p>