I have followed your suggestion and installed XAMPP for local testing and made a new site from the beginning. I did not realise new sites have to build with XAMPP already installed.
However I still cannot get any menu functionality to Preview in Browser on CS3 now.
Is there any way to achieve this when XAMPP is installed?
I find the bombardment of messages in XAMPP 'challenging', confusing and time consuming.
I have never had any webdesign tuititon and completely self taught for CS3. My website are for my own businesses which is nothing to do with web design. I fear the above to be too time consuming.
As a result I have remade my site again..without any local testing server. This time the menus and preview in browser work as they should do.
There must have been some bug in the css code here.
Thank you for your assistance.