function chgBg(zelle) {
	x = document.getElementById(zelle)
	x.style.background = "#FF9933";
	
	x.style.borderTop = "1px solid #333399"
	x.style.borderLeft = "1px solid #333399"
	x.style.borderBottom = "2px solid #333399"
	x.style.borderRight = "2px solid #333399"
	
	if (zelle == 'problem' || zelle == 'partner') {
		x.style.borderRight = "0px solid #333399"
	}
	
	welche = zelle+"layer"
	y = document.getElementById(welche)
	
		if (zelle == 'partner' || zelle == 'problem') {
		y.style.visibility = "visible"
		y.style.borderTop = "1px solid #333399"
		y.style.borderRight = "2px solid #333399"
		y.style.borderBottom = "2px solid #333399"
		}
		else {
		}
}

function chgBgOff(zelle) {
	x = document.getElementById(zelle)
	x.style.background = "#CCCCCC";
	x.style.borderTop = "1px solid #CCCCCC"
	x.style.borderLeft = "1px solid #CCCCCC"
	x.style.borderRight = "2px solid #CCCCCC"
	x.style.borderBottom = "2px solid #CCCCCC"
	welche = zelle+"layer"
	y = document.getElementById(welche)
	if (navigator.appVersion.substring(0, 1) < "4") {
	y.visibility = "hide"
	}
	else {
		 if (zelle == 'partner' || zelle == 'problem') {
			y.style.visibility = "hidden"
			}
		else {
		}
	}
}
	
function chgCont(ziel) {
	x = document.getElementById('ifrm')
	x.src = "iframes/"+ziel+".html"
}
function getDocHeight(doc) {
  var docHt = 0, sh, oh;
  if (doc.height) docHt = doc.height;
  else if (doc.body) {
    if (doc.body.scrollHeight) docHt = sh = doc.body.scrollHeight;
    if (doc.body.offsetHeight) docHt = oh = doc.body.offsetHeight;
    if (sh && oh) docHt = Math.max(sh, oh);
  }
  return docHt;
}

function setIframeHeight(iframeName) {
  var iframeWin = window.frames[iframeName];
  var iframeEl = document.getElementById? document.getElementById(iframeName): document.all? document.all[iframeName]: null;
  if ( iframeEl && iframeWin ) {
    iframeEl.style.height = "auto"; // helps resize (for some) if new doc shorter than previous  
    var docHt = getDocHeight(iframeWin.document);
    // need to add to height to be sure it will all show
    if (docHt) iframeEl.style.height = docHt + 30 + "px";
  }
}

function loadIframe(iframeName, url) {
  if ( window.frames[iframeName] ) {
    window.frames[iframeName].location = url;   
    return false;
  }
  else return true;
}
function zellcheck(zelle) {
		
	if (zelle == 'home') {
		document.getElementById('Aktuell').style.visibility = "visible"
		document.getElementById('Spruch').style.visibility = "visible"
	}

	else {
		document.getElementById('Aktuell').style.visibility = "hidden"
		document.getElementById('Spruch').style.visibility = "hidden"
	}
}