How can I reference the value (or any other property) of the selected item in a CFTREE?

Question

I have a CFTREE (format = "Flash") used to display a hierarchy of users. For the lowest level of the hierarchy, I want to open a popUpWindow using an existing JavaScript function. I've tried adding "javascript:myPopUpFunc(...)" to the href property, but it does not work. I need to pass values in the URL based on item that was clicked (i.e. the item's ID and the item's parent's ID). Is there any way to access the selected item in the tree in ActionScript (or otherwise) in order to call a javascript function to open my popUp. I'm using ColdFusion 8.