setInterval('reloadImages()', 30000);  // 30 seconds
function reloadImages()
{
	document.images['webcam1'].src = 'http://webcam.doce.nl/captured-video0.jpg?' + Math.random();
	document.images['webcam2'].src = 'http://webcam.doce.nl/captured-video1.jpg?' + Math.random();
}