This appears to be a duplicate of http://forums.cnet.com/5208-6142_102-0.html?forumID=5&threadID=251303&messageID=2508213 , although there is new information here.
I am locking this thread and adding the new information to the discussion above.
i'm writing JS program to preview image/pdf/others in iframe in browser..
if i select files from network area , i see the preview... but if i browse and select the files from local hard drives.. the file does not show preview in the browser..
am using IE 6.0.2900
xp - home edition 2002 - service pack 2