[eluser]John_Betong[/eluser]
[quote author="Ian Jones" date="1264066859"]Cheers guys, all useful responses thank you.[/quote]
I still think that to install the Firefox addon is the best bet because it easily validates your HTML code. (Any errors or warnings gives your browser extra work to find the best option to overcome the errors).
Also to use the PHP code to remove all extra spaces and line-feeds which will no doubt make the page load faster.