function showHide (id) {
if (document.getElementById(id).style.display == "block")
	document.getElementById(id).style.display = "none";
	else
	document.getElementById(id).style.display = "block";
}

// Check multiple choice reeks

function CheckMC () {
var mcSet = document.getElementsByTagName("input");
	for (var i=0; i<mcSet.length; i++) {
		if (mcSet[i].getAttribute("type")=="radio") {
			if (mcSet[i].checked) {
				if (mcSet[i].value == "true") {
					var PNode = mcSet[i].parentNode;
					while ((PNode.nodeType != 1) || (PNode.className != "mcitem")) 
					{
						PNode = PNode.parentNode;
					}
					while ((PNode.nodeType != 1) || (PNode.className != "fdcorrect")) 
					{
						PNode = PNode.nextSibling;
					}
					PNode.style.display = "block";
					while ((PNode.nodeType != 1) || (PNode.className != "fdfalse")) 
					{
						PNode = PNode.nextSibling;
					}					
					PNode.style.display = "none";
				}
				else {
					var PNode = mcSet[i].parentNode;
					while ((PNode.nodeType != 1) || (PNode.className != "mcitem")) {
						PNode = PNode.parentNode;
					}
					while ((PNode.nodeType != 1) || (PNode.className != "fdcorrect")) {
						PNode = PNode.nextSibling;
					}
					PNode.style.display = "none";
					while ((PNode.nodeType != 1) || (PNode.className != "fdfalse")) {
						PNode = PNode.nextSibling;
					}					
					PNode.style.display = "block";
				}
			}
		}
	}
}