function pricecheck() {

  var i      = 0;
  var menge  = 0;
  var min    = 0;
  var preis  = 0;
  var gpreis = 0;
  var text   = new Array();

  // Auswahl der Listboxen entnehmen
  for(i=0; i<4; i++) {

    text[i] = document.getElementsByTagName("select")[i].options[document.getElementsByTagName("select")[i].selectedIndex].text;

    if (text[i].indexOf("+") >= 0) {
      // Preis herausoperieren
      text[i] = text[i].substring(text[i].indexOf("+"),text[i].length);
      text[i] = text[i].replace("EUR","");
      text[i] = text[i].replace(" ","");
      text[i] = text[i].replace("+","");
      text[i] = text[i].replace(",",".");
      preis   = preis + Number(text[i]);
    }
    if (text[i].indexOf("-") >= 0) {
      // Preis herausoperieren
      text[i] = text[i].substring(text[i].indexOf("-"),text[i].length);
      text[i] = text[i].replace("EUR","");
      text[i] = text[i].replace(" ","");
      text[i] = text[i].replace("-","");
      text[i] = text[i].replace(",",".");
      preis   = preis - Number(text[i]);
    }
  }

  // Menge Abfragen
  menge  = document.getElementsByTagName("input")[0].value;
  min    = document.getElementById("min").firstChild.nodeValue;
  if (menge < min) menge = min;
  document.getElementsByTagName("input")[0].value = menge;

  gpreis = document.getElementById("price").firstChild.nodeValue;
  gpreis = gpreis.replace(" ab   ","");
  gpreis = gpreis.replace(" EUR","");
  gpreis = gpreis.replace(",",".");
  gpreis = Number(gpreis);

  // Neuen Preis bestimmen
  preis = (preis + Number(gpreis)) * menge;
  preis = preis.toFixed(2) + " EUR exkl. Versandkosten";
  preis = preis.replace(".",",");

  // Preis ausgeben
  document.getElementById("summe").firstChild.nodeValue = (preis);
}

function mime() {
  var menge = 0;
  var min   = 0;

  menge  = document.getElementsByTagName("input")[0].value;
  min    = document.getElementById("min").firstChild.nodeValue;
  if (menge < min) menge = min;
  document.getElementsByTagName("input")[0].value = menge;
}