Scroll to anchor points only / scroll override

I wanted to implement a feature where the page automatically scrolls to the next anchor point (up or down) similar to this page: http://www.htc.com/ch-de/smartphones/htc-one-m9/

I already have a page somewhat customized ( http://www.cubee.ch/wip ) and most things run smoothly, but I couldn't figure out how to scroll to the anchor without link / click :(

Thanks for any help! Simon