<!---
function round(number,X) 
{
// rounds number to X decimal places, defaults to 3
	X = (!X ? 3 : X);
	return Math.round(number*Math.pow(10,X))/Math.pow(10,X);
}

function onken(fs,qts,vas,r,n)
 {
  var vb = vas * qts * qts * n;
  var f3 = (1 / Math.sqrt(n)) * (fs / qts);
  var fb = 0.39 * fs / qts;
  var cab = vb / (1.4 *Math.pow(10,6));
  var mapa = Math.pow((2 * 3.14159 * fb), 2);
  var map = Math.pow((mapa* cab),-1);
  var se = (r * r * 3.14159) * 9 / 10;
  var ll = map * se / 1.293;
  var l = ll - 1.4 * Math.sqrt(se / (2 * 3.14159));
  var pvb = (se * l) / 1000;
  var pvb = round(pvb, 2);
  var vbincl = round((vb + pvb), 2 );
  var vb = round(vb,2);
  var f3 = round(f3, 2);
  var fb = round(fb, 2);
  var se = round(se, 2);
  var l = round(l, 2);

  document.ber.vb.value = vb;
  document.ber.f3.value = f3;
  document.ber.fb.value = fb;
  document.ber.se.value = se;
  document.ber.l.value = l;
  document.ber.pvb.value = pvb;
  document.ber.vbincl.value = vbincl;
 }
//--->