// Funktion in javascript.js
function zeigunterseiten(element){
if(document.getElementById(element).style.display == 'none')
document.getElementById(element).style.display = 'block';
else
document.getElementById(element).style.display = 'none';
}

function zeigeins(element){
document.getElementById(element).style.display = 'block';
document.getElementById('d11').style.backgroundColor = '#DCDCDC';
document.getElementById('div_2').style.display = 'none';
document.getElementById('d22').style.backgroundColor = '#FFFFFF';
document.getElementById('d22').style.border = '1px solid #BDBDBD';
document.getElementById('d22').style.borderBottom = '0px solid red';
document.getElementById('div_3').style.display = 'none';
document.getElementById('d33').style.backgroundColor = '#FFFFFF';
document.getElementById('d33').style.border = '1px solid #BDBDBD';
document.getElementById('d33').style.borderBottom = '0px solid red';
document.getElementById('div_4').style.display = 'none';
document.getElementById('d44').style.backgroundColor = '#FFFFFF';
document.getElementById('d44').style.border = '1px solid #BDBDBD';
document.getElementById('d44').style.borderBottom = '0px solid red';
}

function zeigzwei(element){
document.getElementById('d11').style.backgroundColor = '#FFFFFF';
document.getElementById(element).style.display = 'block';
document.getElementById('d11').style.border = '1px solid #BDBDBD';
document.getElementById('d11').style.borderBottom = '0px solid red';
document.getElementById('d22').style.backgroundColor = '#DCDCDC';
document.getElementById('d22').style.border = '1px solid black';
document.getElementById('d22').style.borderBottom = '0px solid red';
document.getElementById('div_1').style.display = 'none';
document.getElementById('div_3').style.display = 'none';
document.getElementById('d33').style.backgroundColor = '#FFFFFF';
document.getElementById('d33').style.border = '1px solid #BDBDBD';
document.getElementById('d33').style.borderBottom = '0px solid red';
document.getElementById('div_4').style.display = 'none';
document.getElementById('d44').style.backgroundColor = '#FFFFFF';
document.getElementById('d44').style.border = '1px solid #BDBDBD';
document.getElementById('d44').style.borderBottom = '0px solid red';

}

function zeigdrei(element){
document.getElementById(element).style.display = 'block';
document.getElementById('d33').style.backgroundColor = '#DCDCDC';
document.getElementById('d33').style.border = '1px solid black';
document.getElementById('d33').style.borderBottom = '0px solid red';
document.getElementById('div_2').style.display = 'none';
document.getElementById('d22').style.backgroundColor = '#FFFFFF';
document.getElementById('d22').style.border = '1px solid #BDBDBD';
document.getElementById('d22').style.borderBottom = '0px solid red';
document.getElementById('div_1').style.display = 'none';
document.getElementById('d11').style.backgroundColor = '#FFFFFF';
document.getElementById('d11').style.border = '1px solid #BDBDBD';
document.getElementById('d11').style.borderBottom = '0px solid red';
document.getElementById('div_4').style.display = 'none';
document.getElementById('d44').style.backgroundColor = '#FFFFFF';
document.getElementById('d44').style.border = '1px solid #BDBDBD';
document.getElementById('d44').style.borderBottom = '0px solid red';
}

function zeigvier(element){
document.getElementById('div_1').style.display = 'none';
document.getElementById('d11').style.backgroundColor = '#FFFFFF';
document.getElementById('d11').style.border = '1px solid #BDBDBD';
document.getElementById('d11').style.borderBottom = '0px solid red';
document.getElementById('div_2').style.display = 'none';
document.getElementById('d22').style.backgroundColor = '#FFFFFF';
document.getElementById('d22').style.border = '1px solid #BDBDBD';
document.getElementById('d22').style.borderBottom = '0px solid red';
document.getElementById('div_3').style.display = 'none';
document.getElementById('d33').style.backgroundColor = '#FFFFFF';
document.getElementById('d33').style.border = '1px solid #BDBDBD';
document.getElementById('d33').style.borderBottom = '0px solid red';
document.getElementById(element).style.display = 'block';
document.getElementById('d44').style.backgroundColor = '#DCDCDC';
document.getElementById('d44').style.border = '1px solid black';
document.getElementById('d44').style.borderBottom = '0px solid red';
}