How to grab the tree prompt control using Javascript in Cognos 8.4

[Kindness]

Does naybody know how to grab the tree prompt control using Javascript in Cognos 8.4. In the document "Upgrading JavaScript Applications from Cognos ReportNet 1.x and Cognos 8.1/8.2 BI to Cognos 8.3/8.4 BI" have written "Unable to grab the tree prompt control using Javascript in IBM Cognos 8.3". what about Cognos 9.4, does this feature implemented in this version?

Yhanks in advance.

[Arsenal]

Am no JS guy, but shouldn't it be window.treepromptboxname where promptboxname = whatever you've named your tree prompt?

[AussiePete2011]

https://www-304.ibm.com/support/docview.wss?uid=swg24021973
https://www-304.ibm.com/support/docview.wss?uid=swg21385585
http://www.spotonsystems.com/spoton-blog/bid/8698/Accessing-Prompt-Controls-in-Cognos-8-4-with-Javascript