var Timer;
var elem;
var aktiveSub;
function SubNav(id) {
	document.getElementById('subnavx1').style.display = 'none';
	document.getElementById('subnavx2').style.display = 'none';
	document.getElementById('subnavx3').style.display = 'none';
	document.getElementById('subnavx4').style.display = 'none';
	aktiveSub = id;
	elem = document.getElementById("subnavx"+id);
	elem.style.display = 'block';
	if(Timer != null) {
		clearInterval(Timer);
	} 
	Timer = setInterval('CheckSubNav()',1000);
}
function CheckSubNav() {
	elem.style.display = 'none';
}
function SubNavHide() {
	if(aktiveSub != null) {
		document.getElementById('subnavx'+aktiveSub).style.display = 'none';
	}
}

function ShowAssistent() {
	document.getElementById('Assistent').style.display = 'block';
}
function HideAssistent() {
	document.getElementById('Assistent').style.display = 'none';
}

function ShowBuch() {
	document.getElementById('Buch').style.display = 'block';
}
function HideBuche() {
	document.getElementById('Buch').style.display = 'none';
}