function ShowBox(value) {
	var list = new Array();
	for (var i = 0; i < document.getElementById("DropBox").childNodes.length; i++) {
		if (document.getElementById("DropBox").childNodes[i].nodeName == "LI") {
			list.push(document.getElementById("DropBox").childNodes[i]);
		}
	}
	var box = new Array();
	for (var i = 0; i < document.getElementById("headnav").childNodes.length; i++) {
		if (document.getElementById("headnav").childNodes[i].nodeName == "DIV") {
			box.push(document.getElementById("headnav").childNodes[i]);
		}
	}

	for (var i = 0; i < list.length; i++) {
		var li = list[i];
		var a = li.firstChild;
		var div = box[i];
		if (li.firstChild == value) {
			// Eigenschaften des öffnenden Links
			a.style.backgroundPosition = "0% -75px";
			a.firstChild.style.backgroundPosition = "100% -75px";
			a.firstChild.style.color = "#333333";
			// Eigenschaften der zu öffnenden Box
			var offset = a.offsetLeft;
			div.style.left = offset+"px";
			div.style.display = "block";
		} else {
			// Eigenschaften der restlichen Links zurücksetzen
			a.style.backgroundPosition = "top left";
			a.firstChild.style.color = "#d9d9d9";
			a.firstChild.style.backgroundPosition = "top right";
			// Eigenschaften der restlichen Boxen zurücksetzen
			div.style.display = "none";
		}
	}
}

function HideBox() {
	var list = new Array();
	for (var i = 0; i < document.getElementById("DropBox").childNodes.length; i++) {
		if (document.getElementById("DropBox").childNodes[i].nodeName == "LI") {
			list.push(document.getElementById("DropBox").childNodes[i]);
		}
	}
	var box = new Array();
	for (var i = 0; i < document.getElementById("headnav").childNodes.length; i++) {
		if (document.getElementById("headnav").childNodes[i].nodeName == "DIV") {
			box.push(document.getElementById("headnav").childNodes[i]);
		}
	}

	for (var i = 0; i < list.length; i++) {
		var li = list[i];
		var a = li.firstChild;
		var div = box[i];
		
		// Eigenschaften der Links zurücksetzen
		a.style.backgroundPosition = "top left";
		a.firstChild.style.color = "#d9d9d9";
		a.firstChild.style.backgroundPosition = "top right";
		// Eigenschaften der Boxen zurücksetzen
		div.style.display = "none";
	}
}