function hintergrund(x,y,z)
{
x = "antwort" + x;
z = "l" + z;
if (y==0 && document.getElementById(x).className != "klicked") /* an */
  { 
  document.getElementById(x).className = "choosed"; 
  document.getElementById(z).className = "frageaktiv";
  document.getElementById(x+'a').className = "choosed"; 
  //document.getElementById(z+'a').className = "frageaktiv";
  }
else 
  { 
	  if (y==2)
		{ 
			document.getElementById("antwort1").className = "weiss";
			document.getElementById("antwort2").className = "weiss";
			document.getElementById("antwort3").className = "weiss";
			document.getElementById("antwort4").className = "weiss";
			document.getElementById("antwort1a").className = "weiss";
			document.getElementById("antwort2a").className = "weiss";
			document.getElementById("antwort3a").className = "weiss";
			document.getElementById("antwort4a").className = "weiss";
			document.getElementById("l1").className = "naviaktiv";
			document.getElementById("l2").className = "naviaktiv";
			document.getElementById("l3").className = "naviaktiv";
			document.getElementById("l4").className = "naviaktiv";
			document.getElementById(x).className = "klicked";
			document.getElementById(x+'a').className = "klicked";
			document.getElementById(z).className = "frageaktiv"; 
		}
		else
		{
			if (y==1 && document.getElementById(x).className == "choosed")
		      { 
		      document.getElementById(x).className = "weiss"; 
		      document.getElementById(x+'a').className = "weiss"; 
			  	document.getElementById(z).className = "naviaktiv"; 
			  	}
		}
  }
}

function mod(a, b) { return a-Math.floor(a/b)*b } 

function antworten(x)
{
	var choice = 0;
	choice = choice+x;
	if (choice == richtig) window.document.antwort.src = Bilder[x].src;
										else window.document.antwort.src = Bilder[0].src;
}

function folgefrage(x)
{
	x++;
	if (x > fragen.length) x=1; 
	folgequiz = x;
	window.location.href='Qwissen.86.0.html?'+folgequiz;
}

var Bilder = new Array();
Bilder[0]    = new Image(); 
Bilder[1]    = new Image(); 
Bilder[2]    = new Image(); 
Bilder[3]    = new Image();
Bilder[4]    = new Image(); 

Bilder[0].src = "fileadmin/user_upload/q_wissen/images/h0_frage_falsch.jpg";
Bilder[1].src = "fileadmin/user_upload/q_wissen/images/h0_frage_a_richtig.jpg";
Bilder[2].src = "fileadmin/user_upload/q_wissen/images/h0_frage_b_richtig.jpg";
Bilder[3].src = "fileadmin/user_upload/q_wissen/images/h0_frage_c_richtig.jpg";
Bilder[4].src = "fileadmin/user_upload/q_wissen/images/h0_frage_d_richtig.jpg";

var x; /* Hintergrund der Zelle aendern ab IE5 und NS6 */

/*if (navigator.appVersion.indexOf("Mac")>0)window.resizeTo(314,450);
		
var xpos = 20;
var ypos = 20;
if (((screen.width/2)-157)>0) xpos = (screen.width/2)-157;
if (((screen.height/2)-225)>0) ypos = (screen.height/2)-225;
this.moveTo (xpos,ypos);*/

today=new Date();
day=today.getDate();
month=today.getMonth()+1;
month=mod(month,2);
if (month==0) month=1;

var nummer = window.location.search;
nummer = nummer.substr(1,3);

if (nummer=='') nummer=Math.floor(Math.random()*fragen.length);

var Aufgabe = new Array();

Aufgabe=fragen[nummer-1].split(';');

if (Aufgabe[5]=='a') richtig = 1;
if (Aufgabe[5]=='b') richtig = 2;
if (Aufgabe[5]=='c') richtig = 3;
if (Aufgabe[5]=='d') richtig = 4;