Getting information from a Image file stored on client side

i am using JSP in my application,
I want to store the image in the database
(in the BLOB datatype column).
For this client will select an image file from his
hard disk .
To select the file I am using file field tag in html i.e
<input type="file" name="blobFieldIns" >
when client will select the specific file using this tag
they will get a path like this
for e.g c:\example\link.jpg
so actually i planned to read the bytes of the file
using FileInputStream in the form of byte [ ] and store
this byte [] array in the database column.
( But this won't work b'coz file is selected is on client side).
so now i am planning to extract information from Image file
(i.e no of bytes)in the JavaScript.
so I want to Know how to do it in javaScript.
Does any one have the sample code???(if yes please send me).
please help me out,
regards,
Ashish.

hi,
take a look at a package from Jason Hunter..
http://www.servlets.com/cos/javadoc/com/oreilly/servlet/MultipartRequest.html
You should assign "multipart/form-data" to the enctype attribute of the FORM tag! like this
<form enctype="multipart/form-data" action="blabla">

The file gets send to the client as a stream in the REQUEST, so there is no need to try and grab it from his HD yourself!
Take alook at how Jason does it, it's open source and try to figure out how you can do it to insert the retrieved file into the DB