This library deals with the very system dependent task of opening a 
web page in a browser. See also library(url) and the HTTP 
package.
- www_open_url(+URL)
- 
Open URL in an external web-browser. The reason to place this 
in the library is to centralise the maintenance on this highly platform 
and browser specific task. It distinguishes between the following cases:
 
- MS-Windows
 If it detects MS-Windows it uses win_shell/2 
to open the URL. The behaviour and browser started depends on 
the Window and Windows-shell configuration, but in general it should be 
the behaviour expected by the user.
 
- Other platforms
 On other platforms it tests the environment variable (see getenv/2) 
namedBROWSERor uses netscape if this variable is 
not set. If the browser is eithermozillaornetscape,
www_open_url/1 
first tries to open a new window on a running using the-remoteoption of netscape. If this fails or the browser is notmozillaornetscapethe system simply passes the URL as first 
argument to the program.