function calculate()
{
	with (document.form1)
	{
		qmresult.value = qm.options[qm.selectedIndex].value;
                highresult.value = high.options[high.selectedIndex].value;
                zustandresult.value = zustand.options[zustand.selectedIndex].value;
                cbm.value = eval(qmresult.value) * eval(highresult.value) * eval(zustandresult.value) * "0.1"
	}
}