Benannte Felder zählen, wenn Sie einen Wert enthalten

OK, then you can use this script as the custom calculation script of a text field to show how many fields in the group have a value:

var fields = ["Mo", "Di", "Mi", "Do", "Fr", "Sa", "So"];
var cnt = 0;
for (var i in fields) {
	var f = this.getField(fields[i]);
	if (f.valueAsString!="") cnt++;
}
event.value = cnt;