NormalMarkt = new Image(); 
NormalMarkt.src = "fileadmin/static/layoutpics/nav/top/markt.gif";
HighlightMarkt = new Image(); 
HighlightMarkt.src = "fileadmin/static/layoutpics/nav_s/top/markt.gif";

NormalGeodaten = new Image(); 
NormalGeodaten.src = "fileadmin/static/layoutpics/nav/top/geodaten.gif";
HighlightGeodaten = new Image(); 
HighlightGeodaten.src = "fileadmin/static/layoutpics/nav_s/top/geodaten.gif";

NormalAnalysen = new Image(); 
NormalAnalysen.src = "fileadmin/static/layoutpics/nav/top/analysen.gif";
HighlightAnalysen = new Image(); 
HighlightAnalysen.src = "fileadmin/static/layoutpics/nav_s/top/analysen.gif";

NormalGeosysteme = new Image(); 
NormalGeosysteme.src = "fileadmin/static/layoutpics/nav/top/geosysteme.gif";
HighlightGeosysteme = new Image(); 
HighlightGeosysteme.src = "fileadmin/static/layoutpics/nav_s/top/geosysteme.gif";

blockedItem="";
function Bildwechsel(Bildname,Bildobjekt) {
if (Bildname!=blockedItem)
    window.document.images[Bildname].src = Bildobjekt.src;
};

function blockBildwechsel(item) {
  Bildwechsel(item,eval("Highlight"+item.substring(0,1).toUpperCase()+item.substring(1,item.length)));
  blockedItem=item;
}

// Menüanzeige
timer="";
stay_alive=false;
stay_alive_menu=false;
stay_alive_sub=0;
myelement=false;

c=0;
function show(entry) {
	
	if (timer) clearTimeout(timer);
	
	if (stay_alive || stay_alive_sub>0 || stay_alive_menu) {
		if (myelement && myelement.style) myelement.style.display="";	
		timer = setTimeout("show()", 1000);
		return true;
	} else {
		if (myelement && myelement.style) myelement.style.display="none";	
	};
	
	if (entry) {
		myelement=document.getElementById(entry);
		timer = setTimeout("show()", 300);
	};
	
};