title: Server requesting image every time
body: <p>i´m getting some strange behaviour when i deployed my web app on windows server with Microsoft IIS.</p>
  
  <p>creating an image object </p>
  
  <pre><code> img = new Image() ; 
   img.src = 'someimg.png' ;
   img.addEventListener('load', incrementImageCount ) ;
  </code></pre>
  
  <p>I´m doing image preloading via javascript and locally it works perfect, but when i deploy on the server the browser request an image every time it´s draw or redraw. So i have some awful looks while it´s loading. So in resources on web inspector i see the same images, multiple times. </p>
  
  <p>Any ideas why this may be happening?</p>