Cannot connect to localhost after permission change

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http://ubuntuforums.org – Localhost apache2 webserver WAS running ok on Ubuntu 13.04. I changed permission on /var/www/ so that I could access it with my non root account. It's a standalone server used only by myself for testing. Now localhost does not run at all :( Ping localhost shows server IS running. The browser error is: Unable to connect Firefox can't establish a connection to the server at localhost. What should I be checking to resolve this? With thanks. (Hardware)