Empty Url Test

**** PLEASE download test files, and run it in your PHP environment.
Summary

              img src=""    img src="#"     script src=""     script src="#"    link href=""    link href="#"   background url()       background url('#')     background url() link     background url('#') link

  Chrome 14       url           url            url                 url              url             url              url                    url                      css -                     css -
  Firefox 6       url -         url -          url -               url -            url -           url -            url                    url                      css -                     css -
  IE 9            none          url            none                url              none            url              none                   index                    none                      css 304




  NOTICE:

   none: none request is send, it is GOOD!
    url: http://test.com/path/test.php
  index: http://test.com/path/
    css: http://test.com/path/test.css

  "-" represents that it is fetched from browser cache.

  background url('') is the same as background url()
  background url('#') is the same as background url(#)
  background-image is the same as background

  You should turn on "Show BF Cache Responses" in Firebug.
Summary

References
