function changeTo(number) {
	
	document.getElementById('workshop1').style.display = "none";
	document.getElementById('workshop2').style.display = "none";
	document.getElementById('workshop3').style.display = "none";
	document.getElementById('workshop4').style.display = "none";
	document.getElementById('workshop5').style.display = "none";
	
	document.getElementById(number).style.display = "block";
}

function changeToWorkshop(number) {
	
	document.getElementById('message1').style.display = "none";
	document.getElementById('message2').style.display = "none";
	document.getElementById('message3').style.display = "none";
	document.getElementById('message4').style.display = "none";
	document.getElementById('message5').style.display = "none";

	
	document.getElementById(number).style.display = "block";	
	
}