title: Force reload image and clearing cache
body: <p>I have a Raspberry Pi overwriting an image on a webserver (not on RPI) using FTP every 1 minute. The problem is that my Refresh button on the webpage don't work as the image is cached. I just see the old image again when my button make the webpage load.</p>
  
  <p>Hitting CRTL+F5 shows the new image but since I want to use this webpage on a smartphone I need a better solution.</p>
  
  <p>I don't want automatic reload page every xx seconds, I want a button that does that manually. But how?</p>
  
  <p>My webpage:</p>
  
  <pre><code>&lt;body&gt;   
      &lt;p style="text-align:center;"&gt;
          &lt;A HREF="javascript:history.go(0)"&gt;Click to refresh the page&lt;/A&gt;
          &lt;img src="CAM2.png" alt="Camera 2" width="100%"&gt;
      &lt;/p&gt;
  &lt;/body&gt;
  </code></pre>