Randomize slider sorting

Hey, really enjoying the slider that you have created.

For the purpose I am using it (stimulating creativity with the user) I feel I am missing the option to have the images show randomized. Currently they are always in the same order. Is there anyway to change the order to have them show randomly when scrolling through them?

Thanks for the answer in advance,

Pieter

The page I need help with: [log in to see the link]