function switchVersand(Art){
	if (Art == 0) {
		document.getElementById("vertrag").disabled = true;
		document.getElementById("vertrag").style.backgroundColor = "#cec2ac";
	} else {
		document.getElementById("vertrag").disabled = false;
		document.getElementById("vertrag").style.backgroundColor = "#FFFFFF";
	}
}

function DatumPlus7(){
	var vonDatum = document.getElementById("SeVon").value;
	
	var arrDate = vonDatum.split(".");
	var bisDatum = new Date(parseInt(arrDate[2], 10), parseInt(arrDate[1], 10)-1, (parseInt(arrDate[0], 10)+7));
	
	var Jahr = bisDatum.getFullYear();
	var Monat = bisDatum.getMonth() + 1;
	var Tag = bisDatum.getDate();
	
	if (Monat < 10) Monat = "0" + Monat;
	if (Tag < 10) Tag = "0" + Tag;

	document.getElementById("SeBis").value = Tag + "." + Monat + "." + Jahr;
}