Netscape browse image does not work.

 <<uploadNetscape.jsp>> Hello,
I am using above jsp to upload the file, in IE I used DiV, in netscape layer
is used, but it is not showing the file dialog box although it shows alerts
at appropriate locations. Please let me know where is the bug in code.
Thanks & Regards,
-Kedar. 
************************************************************************** 
This email (including any attachments) is intended for the sole use of the
intended recipient/s and may contain material that is CONFIDENTIAL AND
PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or
distribution or forwarding of any or all of the contents in this message is
STRICTLY PROHIBITED. If you are not the intended recipient, please contact
the sender by email and delete all copies; your cooperation in this regard
is appreciated.
**************************************************************************