function SelectAll(mark) {
  for (i = 0; i < document.listtree.elements.length; i++) {
    var item=document.listtree.elements[i];
    if (item.name == "Item[]") {
      item.checked = mark;
    }
    if (item.name == "ch_all") {
      item.checked = mark;
    }
  }
}
function nmove() {
  var need=false;
  for (i = 0; i < document.listtree.elements.length; i++) {
    var item=document.listtree.elements[i];
    if (item.name == "Item[]" && item.checked) {
      need = true;
      break;
    }
  }
  if (need) {
    document.forms.listtree.elements.action.value='move_link';
    document.forms.listtree.submit();
  }
}
function ndel() {
  if (confirm('Are you sure to delete?')) {
    for (i = 0; i < document.listtree.elements.length; i++) {
      var item = document.listtree.elements[i];
      if (item.name == "Item[]" && item.checked) {
        document.forms.listtree.elements.action.value = 'delete_group';
        document.forms.listtree.submit();
        break;
      }
    }
  }
  return false;
}
function show(el) {
   document.getElementById('bg'+el).style.backgroundColor="#338ACD";
 }
function hide(el) {
   document.getElementById('bg'+el).style.backgroundColor="";
}