// Cookiefunktion

function readcookie(n)
{
 a = document.cookie;
 res = '';
 while(a != '')
 {
  while(a.substr(0,1) == ' '){a = a.substr(1,a.length);}
  cookiename = a.substring(0,a.indexOf('='));
  if(a.indexOf(';') != -1)
  {cookiewert = a.substring(a.indexOf('=')+1,a.indexOf(';'));}
  else{cookiewert = a.substr(a.indexOf('=')+1,a.length);}
  if(n == cookiename){res = cookiewert;}
  i = a.indexOf(';')+1;
  if(i == 0){i = a.length}
  a = a.substring(i,a.length);
 }
return(res)
}

function placecookie(Bezeichner,Wert,Dauer)
   {
      jetzt=new Date();
      document.cookie=Bezeichner+"="+Wert+";";
   }
   
function naviswitch(element){
	var id = element;
	switch (id) {
                case '1':
		document.getElementById('sw1').className='mna';
		document.getElementById('sw2').className='';
		document.getElementById('sw3').className='';
		document.getElementById('sw-1').style.display='block';
		document.getElementById('sw-2').style.display='none';
		document.getElementById('sw-3').style.display='none';
		placecookie("navigation",1);
		break;
		case '2':
		document.getElementById('sw1').className='';
		document.getElementById('sw2').className='mna';
		document.getElementById('sw3').className='';
		document.getElementById('sw-1').style.display='none';
		document.getElementById('sw-2').style.display='block';
		document.getElementById('sw-3').style.display='none';
		placecookie("navigation",2);
		break;
		case '3':
		document.getElementById('sw1').className='';
		document.getElementById('sw2').className='';
		document.getElementById('sw3').className='mna';
		document.getElementById('sw-1').style.display='none';
		document.getElementById('sw-2').style.display='none';
		document.getElementById('sw-3').style.display='block';
		placecookie("navigation",3);
		break;
		default:
		break;
	}
}

function naviload() {
navcookie = readcookie("navigation")
         if (navcookie==1) {
		naviswitch("1");
	}
        else if (navcookie==2) {
		naviswitch("2");
	}
        else if (navcookie==3) {
		naviswitch("3");
	}
}
window.onload = function() {
	naviload();
}