url-prefix('http://www.webwallpapers.net/wp-content/uploads/2011/08/Naruto_wallpaper_by_natsu_no_shi.jpg') {
/*
the code in here only applies to:
-pages on the domain www.webwallpapers.net
-pages whose URLs start with http://www.webwallpapers.net/wp-content/uploads/2011/08/Naruto_wallpaper_by_natsu_no_shi.jpg
*/
}