rem: if (active_languages_treeroot.childNodes.length > 1) 
add: if (active_languages.childNodes.length > 1) 
context: function MoveUp() {  if (active_languages.selectedItems.length == 1) {    var selected = active_languages.selectedItems[0];    var before = selected.previousSibling    if (before) {      before.parentNode.insertBefore(selected, before);      active_languages.selectItem(selected);      active_languages.ensureElementIsVisible(selected);    }  }    if (active_languages.selectedIndex == 0)  {    // selected item is first    var moveUp = document.getElementById("up");    moveUp.disabled = true;  }  if (active_languages_treeroot.childNodes.length > 1)  {    // more than one item so we can move selected item back down    var moveDown = document.getElementById("down");    moveDown.disabled = false;  }  UpdateSavePrefString();} //MoveUp
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/1e2d5d9ba4147d5ea3cc58789a6ba7f2426d0695/pref-languages.js/buggy/suite/common/pref/pref-languages.js