// Sponsor page
function show(menuitem) 
{
var listElementStyle = document.getElementById(menuitem).style;
if (listElementStyle.display=="none"){
  listElementStyle.display="block";
}
else {
  listElementStyle.display="none";
}
switch(menuitem) {
	case "chunk1":
	document.getElementById('chunk2').style.display = "none";
	document.getElementById('chunk3').style.display = "none";
	document.getElementById('spontv1').style.display = "block";
	document.getElementById('spontv2').style.display = "none";
	document.getElementById('spontv3').style.display = "none";
	break;
	case "chunk2":
	document.getElementById('chunk1').style.display = "none";
	document.getElementById('chunk3').style.display = "none";
	document.getElementById('spontv1').style.display = "none";
	document.getElementById('spontv2').style.display = "none";	
	document.getElementById('spontv3').style.display = "block";
	break;
	case "chunk3":
	document.getElementById('chunk1').style.display = "none";
	document.getElementById('chunk2').style.display = "none";
	document.getElementById('spontv1').style.display = "none";
	document.getElementById('spontv2').style.display = "block";	
	document.getElementById('spontv3').style.display = "none";
	break;
}	
}