jQuery + JS Slider issue with animating to previous image
===

Here is a JSfiddle.

I'm trying to make a simple slider with a previous and next button. I am not sure how to make the previous button work because prepending images (the when slider moves to the previous item) causes the current image to become the first image -  of the prepended images. 

And advice/help here is really appreciated. 

http://jsfiddle.net/Ef5HM/1/