function weingut() {
// Uid der Felder In Powermail hier die Felder der Weinsorten !  
 if (document.getElementById('uid49').value && document.getElementById('uid50').value && document.getElementById('uid51').value) {
  var feld1 = document.getElementById('uid49').value;
  var feld2 = document.getElementById('uid50').value;
  var feld3 = document.getElementById('uid51').value;
  if (feld1 == '') feld1 = 0;
  if (feld2 == '') feld2 = 0;
  if (feld3 == '') feld3 = 0;
  var zusammen = intval(feld1) * 18.50 + intval(feld3) * 17.50;
  zusammen += intval(feld2) * 17.50;

// Uid der Felder In Powermail hier das Ausgabefeld !  
document.getElementById('uid52').value = number_format(zusammen, 2 ) + 'CHF';
 }
}

function intval (mixed_var, base) {
    var type = typeof( mixed_var );
 
    if (type === 'boolean') {        return (mixed_var) ? 1 : 0;
    } else if (type === 'string') {
        tmp = parseInt(mixed_var, base || 10);
        return (isNaN(tmp) || !isFinite(tmp)) ? 0 : tmp;
    } else if (type === 'number' && isFinite(mixed_var) ) {        return Math.floor(mixed_var);
    } else {
        return 0;
    }
} 


// Round an integer
function number_format (number, decimals, dec_point, thousands_sep)
{
  var exponent = "";
  var numberstr = number.toString ();
  var eindex = numberstr.indexOf ("e");
  if (eindex > -1)
  {
    exponent = numberstr.substring (eindex);
    number = parseFloat (numberstr.substring (0, eindex));
  }
  
  if (decimals != null)
  {
    var temp = Math.pow (10, decimals);
    number = Math.round (number * temp) / temp;
  }
  var sign = number < 0 ? "-" : "";
  var integer = (number > 0 ? 
      Math.floor (number) : Math.abs (Math.ceil (number))).toString ();
  
  var fractional = number.toString ().substring (integer.length + sign.length);
  dec_point = dec_point != null ? dec_point : ".";
  fractional = decimals != null && decimals > 0 || fractional.length > 1 ? 
               (dec_point + fractional.substring (1)) : "";
  if (decimals != null && decimals > 0)
  {
    for (i = fractional.length - 1, z = decimals; i < z; ++i)
      fractional += "0";
  }
  
  thousands_sep = (thousands_sep != dec_point || fractional.length == 0) ? 
                  thousands_sep : null;
  if (thousands_sep != null && thousands_sep != "")
  {
	for (i = integer.length - 3; i > 0; i -= 3)
      integer = integer.substring (0 , i) + thousands_sep + integer.substring (i);
  }
  
  return sign + integer + fractional + exponent;
}