I have no real idea how search engines work when they index a page, but I would assume they do not execute any of the Javascript, just grab the text based file

I have no real idea how search engines work when they index a page, but I would assume they do not execute any of the Javascript, just grab the text based file from the server and analyze it. (does anyone have any insight into this?) So I was pretty excited to try it until I realised that if that is the case - this is probably the worst SEOed site I have ever seen, it literally has no SEO. Its a good idea, but personally after the usability of a site, it being nicely SEOed is really, really important.