in reply to Hide the url.

if using Apache, you can use mod_rewrite, in a .htaccess file, write something like: 
RewriteEngine on
RewriteBase /~user/
RewriteRule ^book   /~user/cgi-bin/c.cgi?menu=1

[download]
another idea you could use is: 
RewriteEngine on
RewriteBase /~user/
RewriteRule ^menu([0-9]+).html  /~user/cgi-bin/c.cgi?menu=$1 [QSA,L]

[download]
This way you could use

and it will give the correct menu number to the cgi script.

you can learn more about mod_rewrite at apache's documentation, or by Googling.

In Section Seekers of Perl Wisdom