function  number_format(  number, laenge, sep, th_sep ) {

  number = Math.round( number * Math.pow(10, laenge) ) / Math.pow(10, laenge);
  str_number = number+"";
  arr_int = str_number.split(".");
  if(!arr_int[0]) arr_int[0] = "0";
  if(!arr_int[1]) arr_int[1] = "";
  if(arr_int[1].length < laenge){
    nachkomma = arr_int[1];
    for(i=arr_int[1].length+1; i <= laenge; i++){  nachkomma += "0";  }
    arr_int[1] = nachkomma;
  }
  if(th_sep != "" && arr_int[0].length > 3){
    Begriff = arr_int[0];
    arr_int[0] = "";
    for(j = 3; j < Begriff.length ; j+=3){
      Extrakt = Begriff.slice(Begriff.length - j, Begriff.length - j + 3);
      arr_int[0] = th_sep + Extrakt +  arr_int[0] + "";
    }
    str_first = Begriff.substr(0, (Begriff.length % 3 == 0)?3:(Begriff.length % 3));
    arr_int[0] = str_first + arr_int[0];
  }
  return arr_int[0]+sep+arr_int[1];
}

function abrechnung_1() {
  
  var menge_uid5 = document.forms['beks_form_1'].elements['tx_powermail_pi1[uid5]'].value;
  var preis_uid5 = document.forms['beks_form_1'].elements['tx_powermail_pi1[uid10]'].value;
  var betrag_uid5 = menge_uid5 * preis_uid5;
  betrag_uid5 =   Math.round(betrag_uid5 * Math.pow(10,2))/Math.pow(10,2);
  document.forms['beks_form_1'].elements['tx_powermail_pi1[uid11]'].value = number_format(  betrag_uid5 , 2, '.', '');

  var menge_uid6 = document.forms['beks_form_1'].elements['tx_powermail_pi1[uid6]'].value;
  var preis_uid6 = document.forms['beks_form_1'].elements['tx_powermail_pi1[uid12]'].value;
  var betrag_uid6 = menge_uid6 * preis_uid6;
  betrag_uid6 =   Math.round(betrag_uid6 * Math.pow(10,2))/Math.pow(10,2);
  document.forms['beks_form_1'].elements['tx_powermail_pi1[uid13]'].value = number_format(  betrag_uid6 , 2, '.', '');


  var menge_uid25 = document.forms['beks_form_1'].elements['tx_powermail_pi1[uid25]'].value;
  var preis_uid25 = document.forms['beks_form_1'].elements['tx_powermail_pi1[uid27]'].value;
  var betrag_uid25 = menge_uid25 * preis_uid25;
  betrag_uid25 =   Math.round(betrag_uid25 * Math.pow(10,2))/Math.pow(10,2);
  document.forms['beks_form_1'].elements['tx_powermail_pi1[uid28]'].value = number_format(  betrag_uid25 , 2, '.', '');;

  var versand_uid17 = document.forms['beks_form_1'].elements['tx_powermail_pi1[uid17]'].value;
  var betrag_uid17 = versand_uid17 * 1;
  betrag_uid17 =   Math.round(betrag_uid17 * Math.pow(10,2))/Math.pow(10,2);

  var betrag_uid14 = betrag_uid17 + betrag_uid5 + betrag_uid6 + betrag_uid25;
  betrag_uid14 =  Math.round(betrag_uid14 * Math.pow(10,2))/Math.pow(10,2)  ;
  betrag_uid14 = number_format(  betrag_uid14 , 2, '.', '')
  document.forms['beks_form_1'].elements['tx_powermail_pi1[uid14]'].value = betrag_uid14;

 
  /* alert('JavaScript-Function Test: ' + betrag_uid14); */
}