title: Best Performance + jQuery Ajax + Div Refresh
body: <p>Does anyone have good suggestion of the best option for jQuery Ajax to refresh a DIV?</p>
  
  <p>Following are what I'm trying to achieve:</p>
  
  <ol>
  <li>Optimization of performance is emphasized. </li>
  <li>There will be navigation on the left just like Google+/Facebook, on the right, there will be content pane (DIV).</li>
  <li>When user clicks on each navigation, the content pane will refresh accordingly without refreshing the whole page.</li>
  </ol>