title: Is it possible to intercept http calls to images and change them with javascript?
body: <p>I want to add some arguments to all images in a website, but these are dynamic.
  Unfortunately the (only) way I have to do this would be by intercepting the image before loading. Javascript would be the only way to go here since I can change the header.
  Any third party libraries like jquery are not an option.</p>
  
  <p>Something like:
  <strong>http://www.example.com/acme.jpg</strong></p>
  
  <p>Would be captured and transformed into</p>
  
  <p><strong>http://www.example.com/acme.jpg?v=120</strong></p>
  
  <p>The way I see it javacript would have to be, inline, in the header of the page, before the images start to load. I don't need to change the html itself, only intercept when the browser calls the image and tweak it a bit as ilustrated.</p>
  
  <p>Is this possible?</p>