aria-labelledby not aria-labeledby

[Aurelien Levy]

Hi,

I found a small glitch in your code :
el.setAttribute('aria-labeledby', 'tab-' + i);
must be changed to
el.setAttribute('aria-labelledby', 'tab-' + i);

[Oliver Farrell]

@goetsu Good spot. It's been a while since I've done anything with this. It's in need of a rewrite.