function showBlock(block) {
	document.getElementById('beruf').style.display = 'none';
	document.getElementById('link').style.display = 'none';
	document.getElementById(block).style.display = 'block';
}
function showBlock2(block) {
	document.getElementById('bildung').style.display = 'none';
	document.getElementById('link2').style.display = 'none';
	document.getElementById(block).style.display = 'block';
}
function showBlock3(block) {
	document.getElementById('affiliate').style.display = 'none';
	document.getElementById('link3').style.display = 'none';
	document.getElementById(block).style.display = 'block';
}
function showBlock4(block) {
	document.getElementById('programm').style.display = 'none';
	document.getElementById('link4').style.display = 'none';
	document.getElementById(block).style.display = 'block';
}