JavaScript Problem with 6.5.1 pls Help

Hi

My web application was running very well on all platforms when it was under 5.012.

since i upgraded to 6.5.1, i have problems with JavaScript depending on the platform (xp, 2000) and the Machine (PC or Notebook). and some instruction in JavaScript cause errors. especially the getSelectedDocumentEX().

I managed to test on a PC the platform the user is using (XP or 2K) and accordingly use the getSelectedDocumentEX() for 2K and getSelectDocument() for XP. But this does not apply for notebooks where the 2K & XP act the same: as XP.

did someone encounter this problem???. Is there a way to fix??? and have a common instruction for all???

Is there an update for JavaScript???

Thanks for the urgently needed help

Charbel