function checkSecondPerson() {
	if(document.getElementById('secondpersoncheckbox').checked==true) {
		document.getElementById('secondperson').style.display='block';
	} else {
		document.getElementById('secondperson').style.display='none';
	}
}

function checkPersonalData() {
	if(document.getElementById('personaldatacheckbox').checked==true) {
		document.getElementById('personaldata').style.display='block';
	} else {
		document.getElementById('personaldata').style.display='none';
	}
}