How to modify KM upload to accept jpg/bmp files only?

Hi All,
I want to modify the KM upload command so that it accepts only ".jpg or ".bmp" file types. If any other file type is used then give an error message such as "Files of type jpg, bmp can only be uploaded". Also restrict the size to 1 or 2 MB only..
I have also checked out some threads posted in this forum in this regard...
I got 'UIUploadCommand.java' which is the class file of 'upload' (KM UICommand).
but, i am not gettign the reference getContentType of the resource so that i can have a condition to upload only jpg/bmp files ...
Awaiting your replies...
Plz help..
Regards,
SK.

Hi Srinath,
i just ended up doing the same..
Thanks for your reply...
I have a problem ...
I created a UI command called sk_upload with my class name...
i have created a UI command group called sk_group
i have added it in my Layoutset >> coll. renderer >> commands gruop >> sk_group.
but, i don't see the command as a menu !
Can u help me ?

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