Need Help how to start the new Project.

[SweetyChowdhury]

I have been given to automate a web based application.It relates all most to a incident/complaints directory to me.On 1 screen there are about 7 combo boxes.The whole application depends on the selection of values in these combo boxes. I need to verify that if XXX is selected in Combobox1,the values in other corosponding boxes changes.Now again If i select the second value YYY in the combobox1,again the values changes to the other corrosponding comboboxes and so forth.I need to validate each combination values in all the comboboxes.This whole combination reaches to 6000 combinations!!!

I want to know to the best approach to script these logic.Please Help !!