function VideoSwitch(videonumber)
{
	for(var x=1; x <= 5; x++)
	{
		document.getElementById('vid' + x + 'thumb').src = document.getElementById('vid' + x + 'thumb').src.replace('-on','-off');
	}
	
	document.getElementById('vid' + videonumber + 'thumb').src = document.getElementById('vid' + videonumber + 'thumb').src.replace('-off','-on');
	
	document.getElementById('iframe1').src='video/video' + videonumber + '/default.html';
	
}