var NS4,	IE4
var coll = "";
var styleObj = "";
if (parseInt(navigator.appVersion) >= 4)	{
	if (navigator.appName == "Netscape")	{
		NS4 = true;
	} else {
		IE4 = true;
		var coll = "all."
		var styleObj = ".style"
	}
}

function preload(imgObj,imgSrc){
	if (document.images) {
 		eval(imgObj + '=new Image()')
		eval(imgObj +'.src = "'+ imgSrc +'"')
	}
}

//Bilder tauschen
function Bildw(layer,imgName,imgObj) {
    if(document.images) {
	if (document.layers && layer!=null)
		eval('document.'+layer + '.document.images["' + imgName + '"].src = '+imgObj+'.src');
	else 
		document.images[imgName].src = eval(imgObj + ".src");
	}
}
	

function FrameW(fra,layer,imgName,imgObj){ 
    if (document.images){
       	if (document.layers && layer!=null)
		 eval('parent.'+ fra + '.document.'+ layer + '.document.images["' +imgName +'"].src = '+imgObj+'.src');
	else
		eval('parent.'+fra+'.'+imgName+'.src = '+imgObj+'.src');
       
          
	}
}



//Verhindert off-Bild beim Rollover, wenn im Hauptframe die entsprechende Datei geladen ist
function fx(imgM,layer,imgName) {
 	var v=parent.essen_main.nameM;
	var vtext=v.substring(0,v.length-1)	
	if (imgM==v){
		imgObj=imgName + 'on';
		img2Obj='nav'+imgName;
		
	} else {
		imgObj = imgName + 'off';
		img2Obj = 'nav' + vtext;
		
	}
	Bildw(layer,imgName,imgObj);
	Bildw('grundDiv','essennav',img2Obj)
		
}