function show() {
 if (document.getElementById)
  document.getElementById("zeigmal").style.visibility= "visible"; 
  document.getElementById("zeigmal_2").style.visibility= "hidden"; 
  document.getElementById("zeigmal_3").style.visibility= "hidden";
  document.getElementById("zeigmal_4").style.visibility= "hidden";
  document.getElementById("zeigmal_5").style.visibility= "hidden";
  document.getElementById("zeigmal_6").style.visibility= "hidden";
  document.getElementById("zeigmal_7").style.visibility= "hidden";
}
function show_2() {
 if (document.getElementById)
  document.getElementById("zeigmal_2").style.visibility= "visible"; 
  document.getElementById("zeigmal").style.visibility= "hidden";
  document.getElementById("zeigmal_3").style.visibility= "hidden";
  document.getElementById("zeigmal_4").style.visibility= "hidden";
  document.getElementById("zeigmal_5").style.visibility= "hidden";
  document.getElementById("zeigmal_6").style.visibility= "hidden";
  document.getElementById("zeigmal_7").style.visibility= "hidden"; 
}
function show_3() {
 if (document.getElementById)
  document.getElementById("zeigmal_3").style.visibility= "visible";   
  document.getElementById("zeigmal").style.visibility= "hidden";
  document.getElementById("zeigmal_2").style.visibility= "hidden";
  document.getElementById("zeigmal_4").style.visibility= "hidden";
  document.getElementById("zeigmal_5").style.visibility= "hidden";
  document.getElementById("zeigmal_6").style.visibility= "hidden"; 
  document.getElementById("zeigmal_7").style.visibility= "hidden";
}
function show_4() {
 if (document.getElementById)
  document.getElementById("zeigmal_4").style.visibility= "visible";   
  document.getElementById("zeigmal").style.visibility= "hidden";
  document.getElementById("zeigmal_2").style.visibility= "hidden";
  document.getElementById("zeigmal_3").style.visibility= "hidden";
  document.getElementById("zeigmal_5").style.visibility= "hidden";
  document.getElementById("zeigmal_6").style.visibility= "hidden";
  document.getElementById("zeigmal_7").style.visibility= "hidden"; 
}
function show_5() {
 if (document.getElementById)
  document.getElementById("zeigmal_5").style.visibility= "visible";   
  document.getElementById("zeigmal").style.visibility= "hidden";
  document.getElementById("zeigmal_2").style.visibility= "hidden";
  document.getElementById("zeigmal_3").style.visibility= "hidden";
  document.getElementById("zeigmal_4").style.visibility= "hidden";
  document.getElementById("zeigmal_6").style.visibility= "hidden"; 
  document.getElementById("zeigmal_7").style.visibility= "hidden";
}
function show_6() {
 if (document.getElementById)
  document.getElementById("zeigmal_6").style.visibility= "visible";   
  document.getElementById("zeigmal").style.visibility= "hidden";
  document.getElementById("zeigmal_2").style.visibility= "hidden";
  document.getElementById("zeigmal_3").style.visibility= "hidden";
  document.getElementById("zeigmal_4").style.visibility= "hidden";
  document.getElementById("zeigmal_5").style.visibility= "hidden"; 
  document.getElementById("zeigmal_7").style.visibility= "hidden";
}
function show_7() {
 if (document.getElementById)
  document.getElementById("zeigmal_7").style.visibility= "visible";   
  document.getElementById("zeigmal").style.visibility= "hidden";
  document.getElementById("zeigmal_2").style.visibility= "hidden";
  document.getElementById("zeigmal_3").style.visibility= "hidden";
  document.getElementById("zeigmal_4").style.visibility= "hidden";
  document.getElementById("zeigmal_5").style.visibility= "hidden"; 
  document.getElementById("zeigmal_6").style.visibility= "hidden";
}