Heeft er toevallig iemand een scriptje liggen waarbij de achtergrond van een website ieder uur veranderd? Liefst ook dat de achtergrond schermvullend is op iedere resolutie.

Code:

function changeBg()
    document.body.style.backgroundImage = 'url(bg/'+ new Date().getHours() +'.gif)';
}
    window.setInterval(changeBg, 1000);

Wrap this in a Javascript file and link it to every page of your site.

This script will change the background of the website, based on the hour of time (ie 0-23 hours)

Here, the images are stored in the bg directory with names ranging from 0 to 23. There is no randomness involved, since the images will be selected based on the hour of the day. You can slightly change the script for your need.