Not sure how to go about this but take a look at this:

do orshox.com/tab-pages-fea tured-v2.html (remove spaces)

You will notice a few things:

1. The tabs starting with 00, 01, etc. That is working with the tab-pages.js script. It works very nicely.
2. Next button in the content (as well as Previous / Next on other tabs content).

I need to somehow get Next / Previous to do just that. When I click on Next, I want it to go to the next content of the tab (same as Previous for previous tab) but I am not sure how I can achieve this based on the source I have now. 

What I don't want is to reload that whole page again. I just need it to go back and forth between contents just like the tabs are doing.

Any suggestion?