You can try using

tree.dataDescriptor.isBranch(tree.selectedItem, null);

This would return true if it is a folder.

-Sreenivas

--- In [email protected], "Mark" <[EMAIL PROTECTED]> wrote:
>
> I have a Tree that has 2 levels, 1- the folder level, 2- the
document level (pretty basic).  When 
> the user clicks the document I want to show additional information
in a text field.  So I 
> binded the text field to the tree.  When you click the document
level you get the info, but if 
> you click a folder you get an error.  So I suppose I need to do it
with ActionScript, which I'm 
> okay with but I don't know how to determine if the user clicked a
folder or a document, I 
> can't seem to find this in the help files.  Can anyone help with this?
>


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