Please.. some Help needed in coding an application

Hi friends,
i need ur help in completing a small part of the application i am developing. in my application,
(1) on the client side, the user can choose a map, a text file containing data about the map, calculations he can do using the data,he can also choose the colors to be displayed on the map depending on the results obtained.
(2) i have developed the complete client side code and need help in starting with the server side code.
(3) i have two files abc.html and program.html.
(4)in abc.html, i have an image and a submit button, on clicking on the image the user is taken to program.html where he has a set of select tags. the user can choose his options using the select tag and when he clicks on the back button, he is taken back to abc.html.
(5) simultaneously, a window opens containing the user selections encoded as a set of XML tags.
(6) the submit button in abc.html which is initially disabled is now enabled. now on clicking on this submit button, i need to pass the parameters to the server-side program.
on the server, i need to use servlet/JSP that takes as input the selections made by the user via a form.
also i need to use servlet to extract the data from the files chosen by the user and perform calculations on them
what i desperately need is: how to write servlet/JSP that takes these user inputs and processes them??
if u can help me by giving some inital code, i will try to
develop that code further.i am attaching the two files abc.html and program.html as a zip file
thanks in advance and desperately waiting to hear from u.

Isn't this very similar to this thread (which I've now closed)?