function init()
	{
		document.getElementById("rockt").style.visibility="hidden";
		document.getElementById("baltrum").style.visibility="hidden";
		document.getElementById("festival").style.visibility="hidden";
	}

	function show(x)
	{		
		document.getElementById("rockt").style.visibility="hidden";
		document.getElementById("baltrum").style.visibility="hidden";
		document.getElementById("festival").style.visibility="hidden";
		
		if (x=="rockt") 
		{
		if (document.getElementById("boxsetting").value==1)
		{
			document.getElementById("rockt").style.visibility="hidden";
			document.getElementById("boxsetting").value=0;
		}
		else
		{
			document.getElementById("rockt").style.visibility="visible";
			document.getElementById("baltrum").style.visibility="hidden";
			document.getElementById("festival").style.visibility="hidden";
			document.getElementById("boxsetting").value=1;
		}
		}
		if (x=="festival")
		{
		if (document.getElementById("boxsetting").value==2)
		{
			document.getElementById("festival").style.visibility="hidden";
			document.getElementById("boxsetting").value=0;
		}
		else
		{
			document.getElementById("rockt").style.visibility="hidden";
			document.getElementById("baltrum").style.visibility="hidden";
			document.getElementById("festival").style.visibility="visible";
			document.getElementById("boxsetting").value=2;
		}
		}
		if (x=="baltrum")
		{
		if (document.getElementById("boxsetting").value==3)
		{
			document.getElementById("baltrum").style.visibility="hidden";
			document.getElementById("boxsetting").value=0;
		}
		else
		{
			document.getElementById("rockt").style.visibility="hidden";
			document.getElementById("baltrum").style.visibility="visible";
			document.getElementById("festival").style.visibility="hidden";
			document.getElementById("boxsetting").value=3;
		}
		}
	}