Possible Duplicates:
Can I change all my links to just //?
Network-Path Reference URI / Scheme relative URLs
Iv seen some websites using something like this:
background:url(//cdn.domain.com/images/bg-normal.png)
Notice the "//", which the browser automatically translates to "https://" if the page if using HTTPS, and translates to "http://" if the page if using HTTP.
Is it only the modern browsers who supports this notation?
Is it recommended to use this notation, or should I hardcode https:// or http:// in the CSS file depending on HTTPS or HTTP.