title: Real Time data graph
body: <p>I would like to build a web-based real time data graph and i'm looking at the different options such as:</p>
  
  <ul>
  <li>Html5 canvas</li>
  <li>JS libraries with graph support such
  as Extjs</li>
  </ul>
  
  <p>By real time i mean, either the client polling the web server say every second or using reverse ajax; the server pushes data to the client when available.</p>
  
  <p>Can you please recommend any?</p>