function zeige(boxid) {
   
   if (boxid == "box1") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box1').style.visibility = "visible";
      document.getElementById('box1').style.display    = "inline";
      document.getElementById('box2').style.visibility = "hidden";
      document.getElementById('box2').style.display    = "none";
     

   }

   if (boxid == "box2") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box1').style.visibility = "hidden";
      document.getElementById('box1').style.display    = "none";
      document.getElementById('box2').style.visibility = "hidden";
      document.getElementById('box2').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
	
	if (boxid == "box4") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
     

   }

   if (boxid == "box3") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	
	}

if (boxid == "box5") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box5').style.visibility = "visible";
      document.getElementById('box5').style.display    = "inline";
      document.getElementById('box6').style.visibility = "hidden";
      document.getElementById('box6').style.display    = "none";
     

   }

   if (boxid == "box6") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box5').style.visibility = "hidden";
      document.getElementById('box5').style.display    = "none";
      document.getElementById('box6').style.visibility = "hidden";
      document.getElementById('box6').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
	if (boxid == "box7") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box7').style.visibility = "visible";
      document.getElementById('box7').style.display    = "inline";
      document.getElementById('box8').style.visibility = "hidden";
      document.getElementById('box8').style.display    = "none";
     

   }

   if (boxid == "box8") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box7').style.visibility = "hidden";
      document.getElementById('box7').style.display    = "none";
      document.getElementById('box8').style.visibility = "hidden";
      document.getElementById('box8').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
if (boxid == "box9") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box9').style.visibility = "visible";
      document.getElementById('box9').style.display    = "inline";
      document.getElementById('box10').style.visibility = "hidden";
      document.getElementById('box10').style.display    = "none";
     

   }

   if (boxid == "box10") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box9').style.visibility = "hidden";
      document.getElementById('box9').style.display    = "none";
      document.getElementById('box10').style.visibility = "hidden";
      document.getElementById('box10').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
if (boxid == "box11") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box11').style.visibility = "visible";
      document.getElementById('box11').style.display    = "inline";
      document.getElementById('box12').style.visibility = "hidden";
      document.getElementById('box12').style.display    = "none";
     

   }

   if (boxid == "box12") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box11').style.visibility = "hidden";
      document.getElementById('box11').style.display    = "none";
      document.getElementById('box12').style.visibility = "hidden";
      document.getElementById('box12').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
if (boxid == "box13") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box13').style.visibility = "visible";
      document.getElementById('box13').style.display    = "inline";
      document.getElementById('box14').style.visibility = "hidden";
      document.getElementById('box14').style.display    = "none";
     

   }

   if (boxid == "box14") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box13').style.visibility = "hidden";
      document.getElementById('box13').style.display    = "none";
      document.getElementById('box14').style.visibility = "hidden";
      document.getElementById('box14').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
if (boxid == "box15") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box15').style.visibility = "visible";
      document.getElementById('box15').style.display    = "inline";
      document.getElementById('box16').style.visibility = "hidden";
      document.getElementById('box16').style.display    = "none";
     

   }

   if (boxid == "box16") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box15').style.visibility = "hidden";
      document.getElementById('box15').style.display    = "none";
      document.getElementById('box16').style.visibility = "hidden";
      document.getElementById('box16').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
if (boxid == "box17") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box17').style.visibility = "visible";
      document.getElementById('box17').style.display    = "inline";
      document.getElementById('box18').style.visibility = "hidden";
      document.getElementById('box18').style.display    = "none";
     

   }

   if (boxid == "box18") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box17').style.visibility = "hidden";
      document.getElementById('box17').style.display    = "none";
      document.getElementById('box18').style.visibility = "hidden";
      document.getElementById('box18').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}
if (boxid == "box19") {
      document.getElementById('box3').style.visibility = "hidden";
      document.getElementById('box3').style.display    = "none";
      document.getElementById('box19').style.visibility = "visible";
      document.getElementById('box19').style.display    = "inline";
      document.getElementById('box20').style.visibility = "hidden";
      document.getElementById('box20').style.display    = "none";
     

   }

   if (boxid == "box20") {
      document.getElementById('box3').style.visibility = "visible";
      document.getElementById('box3').style.display    = "inline";
      document.getElementById('box19').style.visibility = "hidden";
      document.getElementById('box19').style.display    = "none";
      document.getElementById('box20').style.visibility = "hidden";
      document.getElementById('box20').style.display    = "none";
	  document.getElementById('box4').style.visibility = "hidden";
      document.getElementById('box4').style.display    = "none";
	}


}