How to write an mark entry  page in jsp

i am trying to write an web based page in java to get mark entry for students. By selecting a subjectNmae in the combo box present in the page the student list corresponding to the subject should be displayed with rollNo, stdName and a text box corresponding to them for mark entry and an buttton to submit and a button to approve. kindly guide me with some sample code r links where i could find how to code.

I doubt that you'll find anyone to write the application for you; I won't.
However, there is code available for each of the separate functions that you mention, in various places. I sugges that you start with Sun's Java Tutorial, here http://java.sun.com/docs/books/tutorial/
The section titled "Creating Graphical User Interfaces" will be most interesting and useful, although the other sections are involved.
You can also look at the sample code snippets here:
http://www.exampledepot.com/

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