What if I use this: http://getbootstrap.com/examples/starter-template/ http://getbootstrap.com/examples/starter-template/ and add an img tag with a src to a .bg

What if I use this: http://getbootstrap.com/examples/starter-template/ http://getbootstrap.com/examples/starter-template/ and add an img tag with a src to a .bgp? Will it render when I refresh the browser? I see that the BPG images are decoded in your browser with a small Javascript decoder. So a JS file is referenced in the HTML, and everything will run ok when I refresh? That's the promise?