is that the actual requirement ?. Well, lots of application just dont want the url to show that ".jsp" infact there is a feature to hide the ".action" too.. . But, in your case its otherwise.... I would suggest you to look at your design and code logic again... because showing .jsp just to prevent the double submit is not a good idea.. may be you have a different problem....
paste some code if you need help with that... Thanks.
Time is what we want the most, but what we use the worst. -- William Penn