Here is the scenario.
I have a servlet. This servlet produces the presentation GUI interface that runs on a browser.
This interface contains several inputs where the user is allowed to input some data. At the
click of a button, from my servlet, I call a java class that does some (bit time consuming)
process. What I want is, while the processing is being done by the behind teh scene java class,
I want to show the user a progress bar or something similar, so that the user would know something
is going on. How would I do this?.