Cannot access javascript folder on Apache

Go to /etc/apache2/conf-available/javascript-common.conf, you will find this:

Alias /javascript /usr/share/javascript/
<Directory "/usr/share/javascript/">
     Options FollowSymLinks MultiViews
</Directory>

So you just have to comment this lines (with the # char) (is not recommend to edit directly the file in conf-enabled) to avoid the forbidden error. After that, do this:

a2disconf javascript-common
a2enconf javascript-common

References
https://serverfault.com/questions/274254/cannot-access-javascript-folder