WebPlus X5: How to make random image generator?

I don't know if this is the right forum, but with using X5 i thought this would be the best place, as there may be a feature built into the package.

I'm wanting to add a button to my site where, when you click it, it loads a random image out of a folder embededded on the site (currently 3,000 images).

So it shows a button or a link, and then you click it and it randomly displays 1 of 3,000 images, and you can keep on clicking the button to show a new image?

Is this possible? :)