title: Loading indicator for starting javaScript web-application
body: <p>How can i make something similar like GMail has <a href="http://o7.no/H72gPf" rel="nofollow">http://o7.no/H72gPf</a>
  When application starting, gmail showing progress bar and it show us the percent (part) of loaded content already.</p>
  
  <p>How i can mesure that certain JS file (HTML content, CSS or Images) loaded partially or fully ?</p>
  
  <p>P.S. On server side I would like to use PHP</p>