function openSub(subType) {
	switch (subType) {
		case 1: close("T"); close("B"); openSingle("C"); break;
		case 2: close("C"); close("B"); openSingle("T"); break;
		case 3: close("T"); close("C"); openSingle("B"); break;
		default: break;
	}
}

function closeAll() {
  close("T");
  close("B");
  close("C");
}

function close(letter) {
	var max = getMax(letter);

	for (i = 0; i < max; i++) {
		var id = "subMenu" + letter + "_" + i;
		document.getElementById(id).style.display = "none";
	}
}

function openSingle(letter) {
	var max = getMax(letter);

	for (i = 0; i < max; i++) {
		var id = "subMenu" + letter + "_" + i;
		document.getElementById(id).style.display = "block";
	}
}

function getMax(letter) {
	if (letter == "C") {
		return 4;
	}else if (letter == "T"){
		return 3;
	}else{
		return 5;
	}
}

function fixHeight() {

	var contentHeight = document.getElementById('content').offsetHeight;
	var headerHeight = (document.getElementById('header').offsetHeight);
	var containerHeight = (document.getElementById('footer').offsetHeight);

	var minHeight = document.getElementById('menu').offsetHeight;

	if (contentHeight < minHeight) {
		contentHeight = minHeight - 55;
	}

	document.getElementById("menuBorder").style.height = contentHeight + "px";
	document.getElementById("footer").style.top = contentHeight + headerHeight + "px";
	document.getElementById("container").style.height = headerHeight + contentHeight + containerHeight + "px";
}

function openKaartje() {
	//window.open('kaartje.php', 'Kaartje','status,width=300,height=100');
	document.getElementById('kaartjePopup').style.display = 'block';
}

function sluitKaartje() {
	document.getElementById('kaartjePopup').style.display = 'none';
	location.reload(true);
}