<script>
var backgroundImages = [ ];

function setBackground (imageurl)
	{
	background = document.getElementById("background");
	background.src = imageurl;
	}
	
function changeBackground() 
	{
	alert(backgroundImages[5]);
	}	

<?php
$backgroundImages = scandir('../frontend/images/background');
$backgroundImages = array_diff($backgroundImages, array("..", "."));
$backgroundLink = $images[array_rand($backgroundImages)];
foreach( $backgroundImages as $toJsArray => $convert ) {echo "backgroundImages[$toJsArray] = '$convert';";}
?>
</script>