function show01() {
document.getElementById('grundrisse').src='images/grundriss_loft.jpg';
document.getElementById('nr01').src='assets/nr01_high.gif';
document.getElementById('nr02').src='assets/nr02_low.gif';
document.getElementById('nr03').src='assets/nr03_low.gif';
document.getElementById('nr04').src='assets/nr04_low.gif';
document.getElementById('nr05').src='assets/nr05_low.gif';
}

function show02() {
document.getElementById('grundrisse').src='images/grundriss_oestrich.jpg';
document.getElementById('nr01').src='assets/nr01_low.gif';
document.getElementById('nr02').src='assets/nr02_high.gif';
document.getElementById('nr03').src='assets/nr03_low.gif';
document.getElementById('nr04').src='assets/nr04_low.gif';
document.getElementById('nr05').src='assets/nr05_low.gif';
}

function show03() {
document.getElementById('grundrisse').src='images/grundriss_kupferberg.jpg';
document.getElementById('nr01').src='assets/nr01_low.gif';
document.getElementById('nr02').src='assets/nr02_low.gif';
document.getElementById('nr03').src='assets/nr03_high.gif';
document.getElementById('nr04').src='assets/nr04_low.gif';
document.getElementById('nr05').src='assets/nr05_low.gif';
}

function show04() {
document.getElementById('grundrisse').src='images/grundriss_komponisten.jpg';
document.getElementById('nr01').src='assets/nr01_low.gif';
document.getElementById('nr02').src='assets/nr02_low.gif';
document.getElementById('nr03').src='assets/nr03_low.gif';
document.getElementById('nr04').src='assets/nr04_high.gif';
document.getElementById('nr05').src='assets/nr05_low.gif';
}

function show05() {
document.getElementById('grundrisse').src='images/grundriss_rosengarten.jpg';
document.getElementById('nr01').src='assets/nr01_low.gif';
document.getElementById('nr02').src='assets/nr02_low.gif';
document.getElementById('nr03').src='assets/nr03_low.gif';
document.getElementById('nr04').src='assets/nr04_low.gif';
document.getElementById('nr05').src='assets/nr05_high.gif';
}