function calc(form) {

	var nCoef=document.nozzle.nC.options[document.nozzle.nC.selectedIndex].value;
	var nNoz = form.noNozz.value;
 
	if (nNoz==0) { nNoz=1; }
	// if (nozzle.rotor.checked=true) { var flowTemp = form.flow.value-4; }
	flowTemp = form.flow.value/nNoz;
  
	if (form.flow.value.length==0||form.pressure.value.length==0) {
		alert('Please fill out Pressure AND Flow to calculate!'); 
		document.nozzle.flow.focus();
	} else {
		form.nozzle.value   = Math.round(10*Math.sqrt(flowTemp/(Math.sqrt(form.pressure.value)*.634)*(nCoef/100)))/10 + " mm";
		form.reaction.value = Math.round((Math.sqrt(form.pressure.value)*13.72)*flowTemp*.017)+" N";
		if (nNoz>1) {
			form.nozzle.value   = form.nozzle.value + "/each";
			form.reaction.value = form.reaction.value + "/each";
		}
	} 
}

function checkFlow(){
	alert("Här kommer beräkningen");
	}
	
function checkRotor(){
	if (nozzle.noNozz.value>2) { nozzle.rotor.checked=true; }
	else { nozzle.rotor.checked=false; }
	}