function getRandomImage(dir) {
	$('potd-image').hide();
	new Ajax.Request(
		'__lib/getRandomImage.php',
		{
			method		:	'post',
			parameters	:	'dir=' + dir,
			onSuccess	:	showRandomImage
		}
	);
		
}
	
function showRandomImage(request) {
	$('potd').update( new Element('img', { src: request.responseText.strip(), style: 'border: 0 none' } ) );
}
	
document.observe(
	'dom:loaded',
	getRandomImage.bind(this, '../media/index/potd')
);