rem: cell.setAttribute('label', gAvailDirectories[i][1]); cell.setAttribute('string', gAvailDirectories[i][0]); 
add: cell.setAttribute('label', gAvailDirectories[i].label); cell.setAttribute('string', gAvailDirectories[i].value); 
context: function LoadDirectoriesTree(tree){  var item;  var row;  var cell;    LoadDirectories();  if (tree && gAvailDirectories)  {    for (var i=0; i<gAvailDirectories.length; i++)    {      item = document.createElement('treeitem');      row  = document.createElement('treerow');      cell = document.createElement('treecell');      cell.setAttribute('label', gAvailDirectories[i][1]);      cell.setAttribute('string', gAvailDirectories[i][0]);      row.appendChild(cell);      item.appendChild(row);      tree.appendChild(item);    }  }}
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