I'm wondering how I can create a button that makes my site slide to a div?

Here's the site I'm working on: bit.ly/297LCa

I want to have two buttons, prev and next. I want the site to slide to the next div when clicking on the next button, and slide to the previous div when clicking on the prev button.

How can I do this? Is there any scripts or plugins someone know of, or do I have to create it myself? Maybe I can use something from the Scroll to Top Control plugin?