Hi, developer from Czech republic here.
I'd suggest you to do this on Wordpress anyway, so you can edit things easily, and it'll also look better.
I can do that for you, including buying a template, it'll be finished tomorrow evening (it's night here already). I mean, while it might look like a cool idea to do this in html/js only, it doesn't make much sense for future use these days...
Looking forward to hear from you..:)
Vasik