Amazing work, I just screwed up the hovertab html a bit... I wanted to get rid of the border around the picture and the only way I could do this was deleting <span class=tabbutton> or osmething like that... and now whenever I hover on it it glitches crazily (if oyy don't undertsand see my tumblr) Thanks a bunch!
Ahh that part is imprtant!! You need that piece for the tab to work. You can just remove the border under tabbutton in the css part of your html (the first code you added)