function buildForm() {
	document.getElementById("message").style.display="none";
	document.getElementById("post").style.display="none";
	document.getElementById("callback").style.display="none";
	document.getElementById(document.getElementById("kt").value).style.display="block";
	if(document.getElementById("kt").value=="callback") document.getElementById("adresse").style.display="none";
	else document.getElementById("adresse").style.display="block";
}

function syncContacts(origin) {
	if(origin=="empfaenger") target="rrempfaenger";
	else target="empfaenger";
	document.getElementById(target).value=document.getElementById(origin).value;
}

buildForm();