title: Refresh <img> in jQuery periodically
body: <p>Similar to <a href="https://stackoverflow.com/questions/2104949/how-to-reload-refresh-an-elementimage-in-jquery">How to reload/refresh an element(image) in jQuery</a> but not at the same time.</p>
  
  <p>I have a webcam that saves images every 2 seconds rather than streaming.  Using jQuery (or straight JS) I want to refresh just the image element.</p>
  
  <p>Should be easy, but all my searches show the refresh on request.</p>