function produktDetails(checkbox,elem) {
  var dls = document.getElementById("produkte").getElementsByTagName("dl");
  var checkboxes = document.getElementById("produkte").elements;
  if (checkbox.checked == true) {
    for (var i = 0; i < dls.length; i++) {
      if ( dls[i].className.indexOf(elem) >= 0 &&
           dls[i].className.substr(elem.length+1).indexOf("_") == -1 ) dls[i].style.display = "block";
    }
  } else {
    for (var i = 0; i < dls.length; i++) {
      if ( dls[i].className.indexOf(elem) >= 0 && 
        dls[i].className.length > elem.length    ) dls[i].style.display = "none";
    }
    for (var i = 0; i < checkboxes.length; i++) {
      if ( checkboxes[i].className.indexOf(elem) >= 0 ) checkboxes[i].checked = false;
    }
  }
}

function hiddenProduktDetails() {
  var dls = document.getElementById("produkte").getElementsByTagName("dl");
  for (var i = 0; i < dls.length; i++) {
    if ( dls[i].className.indexOf("_") >= 0 ) dls[i].style.display = "none";
  }
}