function pegelrechner()  {
           var f = document.liste;
           var v1 = f.eingabe.value;   
           var v2 = v1.concat("\n");
           var iart = f.art[1].checked; 
           var trenn = "\r";
           if (v1.indexOf(trenn) < 0) trenn = "\n";
           a = v1.split(trenn);
           var energ = 0;
           var i = 0;
           var n = 0;
           while (i < a.length)  {
             var aa = a[i].replace(",",".");
             var x = parseFloat(aa);
             if (isNaN(x)) break;
             n++;
             energ += Math.pow(10, 0.1 * x);
             i++;
           }
           if (iart) energ /= n;
      	    var pegel =  Math.round(100 * Math.LOG10E * Math.log(energ)) / 10;   
           f.ergebn.value = pegel;
        }
        function aktiv()  {
          var f = document.liste;
          f.eingabe.focus();
        }
        function ende()  {
        close();
        }