ohTotoro_randomBackground

<!DOCTYPE html>
<html>
<body onload="randomBackground()">
<script>
function randomBackground()
{
var backgroundImages= new Array(
"http://i.imgur.com/d4e92ws.jpg",
"http://i.imgur.com/MtYTfi9.jpg",
"http://i.imgur.com/3qFLfml.jpg"
);

var numberOfBackgrounds = backgroundImages.length
var imagesIndex = Math.floor(Math.random()*numberOfBackgrounds);
var backgroundUrl = backgroundImages[imagesIndex];
document.body.style.backgroundImage = 'url(' +backgroundUrl +')';
}

</script>
</body>
</html>