Event.observe(window, 'load', shuffle_start);

var student;
var loader;

function shuffle_start ()
{
	shuffle_load_random_image();
	$('navigation').setStyle({
	  height: '599px'
	});
	
}

function shuffle_load_random_image ()
{
	student = studenten[random_int(0,studenten.length-1)];
	var path = student+"/lib/img/thumb_"+random_int(1,4)+".jpg";
	loader = new ImagePreloader(new Array(path),shuffle_image_loaded);
}

function shuffle_image_loaded (a, b)
{
	if (loader.bError || loader.bAbort)	shuffle_load_random_image (); // on error continue immediately
	else
	{
		var block = $('pic_'+random_int (1, 9));
		block.down().writeAttribute('href', student); // adjust link
		block.down(1).writeAttribute('src', a[0].src ); // write thumb
//		alert (block.down(2).inspect())
		block.down(2).innerHTML = lookup[student]; // write thumb
		setTimeout(shuffle_load_random_image, 800); // wait for next
	}
}

function random_int (min, max)
{
	return Math.floor(Math.random()*(max-min+1))+min;
}