function zeigemenus1() {
document.getElementById("spalte1").style.visibility = "visible";
document.getElementById("spalte2").style.visibility = "hidden";
document.getElementById("spalte3").style.visibility = "hidden";
document.getElementById("spalte4").style.visibility = "hidden";
document.getElementById("spalte5").style.visibility = "hidden";
document.getElementById("spalte6").style.visibility = "hidden";
}

function zeigemenus2() {
document.getElementById("spalte1").style.visibility = "hidden";
document.getElementById("spalte2").style.visibility = "visible";
document.getElementById("spalte3").style.visibility = "hidden";
document.getElementById("spalte4").style.visibility = "hidden";
document.getElementById("spalte5").style.visibility = "hidden";
document.getElementById("spalte6").style.visibility = "hidden";
}

function zeigemenus3() {
document.getElementById("spalte1").style.visibility = "hidden";
document.getElementById("spalte2").style.visibility = "hidden";
document.getElementById("spalte3").style.visibility = "visible";
document.getElementById("spalte4").style.visibility = "hidden";
document.getElementById("spalte5").style.visibility = "hidden";
document.getElementById("spalte6").style.visibility = "hidden";
}

function zeigemenus4() {
document.getElementById("spalte1").style.visibility = "hidden";
document.getElementById("spalte2").style.visibility = "hidden";
document.getElementById("spalte3").style.visibility = "hidden";
document.getElementById("spalte4").style.visibility = "visible";
document.getElementById("spalte5").style.visibility = "hidden";
document.getElementById("spalte6").style.visibility = "hidden";
}

function zeigemenus5() {
document.getElementById("spalte1").style.visibility = "hidden";
document.getElementById("spalte2").style.visibility = "hidden";
document.getElementById("spalte3").style.visibility = "hidden";
document.getElementById("spalte4").style.visibility = "hidden";
document.getElementById("spalte5").style.visibility = "visible";
document.getElementById("spalte6").style.visibility = "hidden";
}

function zeigemenus6() {
document.getElementById("spalte1").style.visibility = "hidden";
document.getElementById("spalte2").style.visibility = "hidden";
document.getElementById("spalte3").style.visibility = "hidden";
document.getElementById("spalte4").style.visibility = "hidden";
document.getElementById("spalte5").style.visibility = "hidden";
document.getElementById("spalte6").style.visibility = "visible";
}

function loeschen() {
document.getElementById("spalte1").style.visibility = "hidden";
document.getElementById("spalte2").style.visibility = "hidden";
document.getElementById("spalte3").style.visibility = "hidden";
document.getElementById("spalte4").style.visibility = "hidden";
document.getElementById("spalte5").style.visibility = "hidden";
document.getElementById("spalte6").style.visibility = "hidden";
}