function Calculate_pad ()
{ 
document.form.D.value=Math.ceil(Math.sqrt(90*document.form.Fn.value/(Math.PI*document.form.pv.value)));

document.form.Luftverbr.value=Math.ceil(0.5+Math.sqrt(document.form.D.value*document.form.pv.value)*0.04);
document.form.S.value=Math.ceil(document.form.Fn.value/10);
}

function Calculate_spindel ()
{ 
document.form.Fr.value=Math.ceil(0.5*document.form.D.value*Math.PI*0.66*document.form.L.value*document.form.pv.value*0.0073);
document.form.Fax.value=Math.ceil(0.75*document.form.D.value*document.form.D.value*Math.PI*document.form.pv.value*0.008);
document.form.Lastres.value=66;
document.form.Fax.value=Math.ceil(0.75*document.form.D.value*document.form.D.value*Math.PI*document.form.pv.value*0.008);
document.form.Srad.value=Math.ceil(document.form.Fr.value/6);
document.form.Sax.value=Math.ceil(document.form.Fax.value/6);
document.form.Luftverbr.value=Math.ceil(3+(Math.sqrt(document.form.D.value*document.form.L.value)*Math.sqrt(document.form.pv.value)*0.025));
}