// legt Dezimalstellen fest und wandelt das Dezimalzeichen . = ,
function Dezimalstellen(num) {
if(isNaN(num))
num = "0";
Vorzeichen = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+
num.substring(num.length-(4*i+3));
return (((Vorzeichen)?'':'-') + num + ',' + cents);
}


// automatisch rechnen und anzeigen
	function rechnen() {
		var wert01 = document.shopform.inputmenge01.value;
		var wert02 = document.shopform.inputmenge02.value;
		var wert03 = document.shopform.inputmenge03.value;
		var wert04 = document.shopform.inputmenge04.value;
		var wert05 = document.shopform.inputmenge05.value;
		var wert06 = document.shopform.inputmenge06.value;
		var wert07 = document.shopform.inputmenge07.value;

		document.shopform.summe01.value = Dezimalstellen(wert01*1 * 2) + " €";
		document.shopform.summe02.value = Dezimalstellen(wert02*1 * 5) + " €";
		document.shopform.summe03.value = Dezimalstellen(wert03*1 * 5) + " €";
		document.shopform.summe04.value = Dezimalstellen(wert04*1 * 7) + " €";
		document.shopform.summe05.value = Dezimalstellen(wert05*1 * 6.9) + " €";
		document.shopform.summe06.value = Dezimalstellen(wert06*1 * 4.4) + " €";
		document.shopform.summe07.value = Dezimalstellen(wert07*1 * 4.4) + " €";
		document.shopform.gesamtsumme.value = Dezimalstellen((wert01*1 * 2) + (wert02*1 * 5) + (wert03*1 * 5) + (wert04*1 * 7) + (wert05*1 * 6.9) + (wert06*1 * 4.4) + (wert07*1 * 4.4)) + " €";
		}