suggestions needed in project

Hi,
i need ur suggestions in doing the following:
in an application that i am developing, the user is allowed to choose the following:
- a blank outline map showing various regions,
- a text file that contains data about the map and
- colors for showing the various provinces in the map.

i have developed a HTML form in which the user is allowed to choose the options as above. using javascript i have created a XML file that represents the user selections. its structure is as below:

<selection>
<map>C:\usa.jpg</map>
<text>C:\data.txt</text>
<color>pink</color>
</selection>

now i want to use servlets to acheive the following:

1) i want the servlets to first extract the parameters chosen by the user specified in the XML file
2) is it possible to use servlets such that the color chosen by the user(ie pink) is applied to specific regions on the map?
i desperately need ur suggestions on coding the above functionalities especialy regarding (2) ie using servlets to apply the user specified colors onto the map.
thanks in advance and waiting to hear from u.