function berechnefeld(Eingabe)
{
  if (Eingabe.value != null && Eingabe.value.length != 0) {
  Eingabe.value = eval(Eingabe.value);
  }
}

function berechneform(form)
{
  var r=0.7;
  if (form.sex.value == "m" || form.sex.value == "M") {
    r=(((20.03-0.1183*form.alter.value+0.3626*form.kgewicht.value)/form.kgewicht.value/0.8)+(0.715-0.00462*form.kgewicht.value+0.0022*form.kgroesse.value))/2. ;
  }
  if (form.sex.value == "w" || form.sex.value == "W") {
    r=(14.46+0.2549*form.kgewicht.value)/form.kgewicht.value/0.8;
  }

  r=Math.round(r*100.)/100. ;
  form.alk.value=form.kgewicht.value * form.cziel.value * r * 1.1 ;
  form.alk.value=Math.round(form.alk.value * 10.)/10. ;
  form.rfak.value = r ;
  form.bier.value = Math.round(form.alk.value * 1000 / 40) ;
  form.wein.value = Math.round(form.alk.value * 1000 / 83.5);
  form.liq.value = Math.round(form.alk.value * 1000 / 199);
  form.s32.value = Math.round(form.alk.value * 1000 / 255);
  form.s40.value = Math.round(form.alk.value * 1000 / 317.9);
}

function loescheform(form)
{
  form.kgewicht.value = "";
  form.kgroesse.value = "";
  form.alter.value = "";
  form.cziel.value = "";
  form.sex.value ="";
  form.rfak.value ="";
}

function fensterA(seite)
{
   msgWindow=open(seite,'displayWindow','toolbar=no,width=700,height=700,directories=no,status=no,scrollbars=yes,resize=no,menubar=no')
}