// sets id attribute of selected node
tree.selectedNode.setAttribute("id", 99);
// removes all selected nodes and sets new selected
tree.selectedNode = tree.rootNode;
// removes all selected nodes
var nodes:Array = tree.selectedNodes;
for each (var treeNode:TreeNode in nodes) tree.removeNode(treeNode);
tree.refresh();
// opens the tree to the specified node and selects it
tree.openToAndSelect(tree.rootNode.firstChild);
// deselects the current selected node
tree.deselectNode(tree.selectedNode);
// deselects nodes in tree
tree.deselectAll();