function toonhoek1() {
document.getElementById('hoek1').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -451px';
}
function verberghoek1() {
document.getElementById('hoek1').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek2() {
document.getElementById('hoek2').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -902px';
}
function verberghoek2() {
document.getElementById('hoek2').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek3() {
document.getElementById('hoek3').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -1353px';
}
function verberghoek3() {
document.getElementById('hoek3').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek4() {
document.getElementById('hoek4').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -1804px';
}
function verberghoek4() {
document.getElementById('hoek4').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek5() {
document.getElementById('hoek5').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -2255px';
}
function verberghoek5() {
document.getElementById('hoek5').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek6() {
document.getElementById('hoek6').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -2706px';
}
function verberghoek6() {
document.getElementById('hoek6').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek7() {
document.getElementById('hoek7').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -3157px';
}
function verberghoek7() {
document.getElementById('hoek7').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek8() {
document.getElementById('hoek8').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -3608px';
}
function verberghoek8() {
document.getElementById('hoek8').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek9() {
document.getElementById('hoek9').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -4059px';
}
function verberghoek9() {
document.getElementById('hoek9').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek10() {
document.getElementById('hoek10').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -4510px';
}
function verberghoek10() {
document.getElementById('hoek10').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek11() {
document.getElementById('hoek11').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -4961px';
}
function verberghoek11() {
document.getElementById('hoek11').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}
function toonhoek12() {
document.getElementById('hoek12').style.display= 'block';
document.getElementById('driehoek1').style.backgroundPosition= '0 -5412px';
}
function verberghoek12() {
document.getElementById('hoek12').style.display= 'none';
document.getElementById('driehoek1').style.backgroundPosition= '0 0';
}