function WPK(form)
    {
for (var j=0; j<document.forms[0].length-7; j=j+3)
    {
    if(document.forms[0].elements[j].value!="")
      var chkZ=1;
    for(i=0;i<document.forms[0].elements[j].value.length;++i)
      {
      if(document.forms[0].elements[j].value.charAt(i) < "0"
      || document.forms[0].elements[j].value.charAt(i) > "9")
        chkZ=-1;
      } //ENDFOR
      if(chkZ==-1)
        {
        alert("Keine gültige Zahl!");
        document.forms[0].elements[j].focus();
        return false;
        }
}
 var finanz=0;
     for (var j=0; j<document.forms[0].length-7; j=j+3)
    {
    if(document.forms[0].elements[j].value=="")
      {
      document.forms[0].elements[j].value=0;
      document.forms[0].elements[j+2].value=0;
      }
    else
      {
      document.forms[0].elements[j+2].value=Math.round(
      document.forms[0].elements[j].value*
      document.forms[0].elements[j+1].value*100)/100;
      }
    finanz=finanz*1+document.forms[0].elements[j+2].value*1;
  }
     document.forms[0].finanz.value=finanz*1;
}