It works with Array types. The example is a simple list of numbers, but the array could contain anything; lists of strings, functions, DOM nodes, whatever. Unfortunately, a lot of things that seem like arrays in the DOM aren't really, so you can't shuffle the images on a page with just document.images.shuffle() all by itself.

I've seen XML 2 Array functions done in other ways but this is the shortest implementation I've seen yet. I didnt write it myself though, but I thought I'd submit it for common good of this site. It uses regex and works prefectly.