title: Prevent google chrome cache html page
body: <p>I have a page with another html page in iframe. In this iframe, i put this header tag </p>
  
  <pre><code>&lt;META http-equiv="Pragma" content="no-cache"&gt;
  &lt;META HTTP-EQUIV="Expires" CONTENT="-1"&gt;
  &lt;meta http-equiv="cache-control" content="no-cache" /&gt;
  </code></pre>
  
  <p>But chrome still cache it, when iframe content changed, hit f5 button but chrome still load cached version, not new version. </p>
  
  <p>Please tell me how to pevent google chrome cache this iframe.</p>