var old="";;
var memold;
var maxsize=800;
var menuanz=5;
var subold;
var start=1;
var displaywidth=0;
var posxIE = new Array(165,250,350,475,630);
var setposxIE =new Array(165,250,350,475,630);
var posxNE = new Array(175,265,355,475,640);
var setposxNE =new Array(175,265,355,475,640);

function clearMenu()
{
	for(i = start-1; i <= menuanz; i++)
  	{	mi="m"+i;
		if(document.layers)
			document.layers[i].visibility="hide";
		else
			document.all[mi].style.visibility="hidden";
	}
	}
function checkNumber(x)
{
	nr = x.substr(1,1)-1;
	return nr;
	}
function show_layer(x)
{
	nr=checkNumber(x);
	if(document.layers)
	{	
		displaywidth=window.innerWidth- maxsize;
		if(displaywidth>=start-1)
 		{
 			setposxNE[nr]= posxNE[nr]+(displaywidth/2);
 		}
 		else
 		{
 			setposxNE[nr]= posxNE[nr];
 		}
		document.layers[x].left=setposxNE[nr];
		document.layers[x].visibility="show";
			
	}
	else
	{		
		displaywidth= document.body.clientWidth- maxsize;
		if(displaywidth>=start-1)
		 {
		 	setposxIE[nr]= 10+posxIE[nr]+displaywidth/2;
		 }
		 else
		 {
		 	setposxIE[nr]= 10+posxIE[nr];
	 	}
		document.all[x].style.left = setposxIE[nr];
	 	document.all[x].style.visibility="visible";
 		}
}

function hide_layer(x)
{
	if(document.layers)
		document.layers[x].visibility="hide";
	else
		document.all[x].style.visibility="hidden";
}

function do_menu(x)
{	window.status='Submenue';
	
	if(!old)
		old=memold;

	if(old!=x)
	{	clearMenu();
		show_layer(x);
		old=x;
	}
		

}

function do_check(x)
{
	if(old && old!=x)
	{
		hide_layer(old);
		show_layer(x);
		old=x;
	}

	do_submenu();
}

function do_out()
{
	if(old)
		hide_layer(old);

	memold=old; old='m0';

	
}

function do_submenu(x)
{
	if(subold)
	{
		hide_layer(subold);
		subold="";
	}

	if(x)
	{
		show_layer(x);
		subold=x;
	}
}
function enterSite()
{	
	document.location.href="Intro2/intro2.html";
	
}
function resetLocation()
{
	
	}
function ladenImages()
{
	var Anzahl = ladenImages.arguments.length;
	var preImg = new Array();
	
	for (i=0;i<Anzahl;i++)
	{
			preImg[i] = new Image;
			preImg[i].src = ladenImages.arguments[i];
	}
}

function Bildwechsel(BildName,BildNeu,Ebene)
{
	if (BildName.slice(parent.frames[0].name.length-1,parent.frames[0].name.length)!=parent.frames[0].name.slice(parent.frames[0].name.length-1,window.name.length))
	{
		if (Ebene == 0)	eval("document."+BildName+".src = 'images/"+BildNeu+".gif'");
		if (Ebene == 1)	eval("document."+BildName+".src = '../images/"+BildNeu+".gif'");
	}	
	
}



function wechsel(BildName,BildNeu)
{
	eval("document."+BildName+".src = '"+BildNeu+"'");
}