function showTour(tour) {
	document.getElementById('iframe').src = 'http://silverworkshosting.co.uk/rsa/tourinfo.php?tour='+tour;
	document.getElementById('tourholder').style.display = 'block';
}

function closeTour() {
	document.getElementById('tourholder').style.display = 'none';
	document.getElementById('iframe').src = 'http://silverworkshosting.co.uk/rsa/tourinfo.php?tour=';
}