// Mouse-Over
function preload_image(img_name,img_src)
{
eval(img_name+' = new Image()');
eval(img_name+'.src = img_src');
}

function switch_image(img_name,img_layer)
{
 	 //IE, NS4.7 and Firebird 0.7 all use the else function unless img_layer is defined
	 // the other function with img_layer is needed for NS4.7 to change an image inside a layer positioned via absolute or relative
	if (document.layers && img_layer != null){
		eval('document.layers["'+img_layer+'"].document.arrow.src='+img_name+'.src');
	} else {
		eval('document.arrow.src='+img_name+'.src');
	}
}

function show(name,h1,h2) {
	if (nsa){
		document.layers['' + name].visibility = "show";
		document.layers['' + h1].visibility = "hide";
		document.layers['' + h2].visibility = "hide";
		
	}
	if (ns6){
		document.getElementById('' + name).style.visibility = 'visible';
		document.getElementById('' + h1).style.visibility = 'hidden';
		document.getElementById('' + h2).style.visibility = 'hidden';
	}
	if (ie){
		document.all['' + name].style.visibility = "visible";
		document.all['' + h1].style.visibility = "hidden";
		document.all['' + h2].style.visibility = "hidden";
	}
}

if (document.layers){
	nsa = 1; 
	ie = 0;
	ns6 = 0;
	//alert('layer');
}
else{
	nsa = 0; 
	ie = 1;
	ns6 = 1;
	//alert('nixlayer');
}
if(navigator.userAgent.indexOf("Gecko")!= -1){
	document.write('<link rel=stylesheet type="text/css" href="../library/style/style_fb.css" />');
	//alert("Firebird"+navigator.userAgent);
}else if(navigator.userAgent.indexOf("MSIE")!= -1){
	document.write('<link rel=stylesheet type="text/css" href="../library/style/style_ie.css" />');
	//alert("IE"+navigator.userAgent);
}else{
	document.write('<link rel=stylesheet type="text/css" href="../library/style/style_ns.css" />');	
	//alert("NS"+navigator.userAgent);
}

// Pre-Loading Images
// Unterseiten
preload_image('on10','../library/img/schreiberA.gif','')
preload_image('off10','../library/img/schreiberA.gif','')

preload_image('on20','../library/img/malerA.gif','')
preload_image('off20','../library/img/schreiberA.gif','')

preload_image('on30','../library/img/schreibwerkzeugA.gif','')
preload_image('off30','../library/img/schreiberA.gif','')

preload_image('on40','../library/img/beschreibstoffeA.gif','')
preload_image('off40','../library/img/schreiberA.gif','')

preload_image('on50','../library/img/tintenA.gif','')
preload_image('off50','../library/img/schreiberA.gif','')

preload_image('on60','../library/img/farbenA.gif','')
preload_image('off60','../library/img/schreiberA.gif','')

preload_image('on70','../library/img/goldSilberA.gif','')
preload_image('off70','../library/img/schreiberA.gif','')

preload_image('on80','../library/img/bindemittelA.gif','')
preload_image('off80','../library/img/schreiberA.gif','')

preload_image('on90','../library/img/einbaendeA.gif','')
preload_image('off90','../library/img/schreiberA.gif','')

preload_image('on100','../library/img/initialenA.gif','')
preload_image('off100','../library/img/schreiberA.gif','')