Looking at how many pages you have on the site STOP! and do yourself a favour and install Wordpress.
I hand coded a 300 page site years ago, page-by-page, (for free for my daughters school), took me months and was impossible to update.
It was a great way to learn HTML etc. which I still use that knowledge every day but I'd never do that now!
Wordpress will make editing a synch plus the plug-ins you can add will bring you a lot of features including
SEO packs, Visitor statistics, anti-spam measures, themed templates, ......
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