It's definitely JavaScript that is the cause. Nearly every website you visit will have 3 or 4 tracking scripts to see how you're using the site so they can get better ad rates. 1 or 2 for social media like disqus or Facebook comments to keep you entertained and coming back. Then a few more just for the site design.

That's why I only browse with lynx. http://maemo.org/packages/view/lynx/