Fix various HTML and JS issues

[fhemberger]

@nodejs/website please review.

[robertkowalski]

+1

I also noticed the href error yesterday that happens because of the template copy&paste and had a patch for it unstaged - but these collection of fixes is super awesome!

Btw (just got reminded of it):

I think the only reason why the template copy&paste started (long before our time) is that the navigation on the left needs different elements (if the submenu is opened) with highlighted elements. The copy & paste almost leads to errors for every new page that is created, which are catched sometimes during the review (and sometimes not). Even when they are catched they cost time.

I started a disussion about a dynamic navigation some time ago nodejs/nodejs.org#81 but I am not sure if we should spend a lot of time for nodejs.org with refactorings if we work on new.nodejs.org soon anyway... thoughts - opinions?

[fhemberger]

but I am not sure if we should spend a lot of time for nodejs.org with refactorings if we work on new.nodejs.org soon anyway...

It's the same for iojs.org … I'd still ship updates and bugfixes but wouldn't invest too much time on new features or refactorings. Better focus our attention on the new website.