Hook a listener into WYSIWYG editor.

[phpnewbie]

Hi, I'm going upgrade my board from 3.0.x to 3.5 but I have a problem with native language typing tool.
My typing tool is a javascript hook into a page which will attatch to all the editable elements (input, textarea) to provide native language generation base on the combination of keyboard input. It works fine for normal input elements but for WYSIWYG editor in Vbb 3.5, I couldn't make it work.
My question is how to add that listener to the editor ?
or at least disable WYSIWYG by default (in worst case)
Thanks.