ActionScript 2.0 :: Skip Over Branches In XML?

Jun 3, 2008

I have an tree component that is populated via XML. There are branch nodes and child nodes for each branch. This is a user interface for an elearning course. The branch nodes/folders in the tree component are for course sections and the child/leaf nodes for each are the content topics. each have a url attribute with a path to the appropriate content swf. The branch nodes/folders in the tree component do nothing when they are clicked on, as intended.

I also have previous/next buttons. They basically just navigate between leaf nodes. However, if the currently playing topic/leaf node is the first underneath a branch/folder, and I click on the 'previous' button, nothing happens. How can I set this thing to 'skip over' branch nodes? Here is the relevant code (the tree change listener, and the previous/next button event handlers:

Code:
var treeClickListener:Object = new Object();
treeClickListener.change = function() {
var item = menu_ctr.selectedItem;

[Code].....

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