JS Slider extension/option

I have a Slideshow. I will like to changed it up a bit.

Basically the slider have a click through functionality using LIs menu which works good.

But I wanted the option of one Arrow that will loop through the slid开发者_如何学JAVAeshow instead of clicking 1, 2, 3, 4, 5...

Just wanted one click that says NEXT and it will do the same thing like the current sliding.

MY FIDDLE is here: http://jsfiddle.net/myislandshop/67fs2/5/

if this can be done with little change in the JS that will be cool.

Just keep a counter of the position instead of retrieving it from the a

JSFiddle: http://jsfiddle.net/Utv9w/1/