servlet showing blank page.

I am new to servlets so i saw a tutorial on the net for the basic servlets . There is the index.jsp which has the following code:

there is a GreetingServlet.java which has the processRequest code as follows:

The values from the textboxes should be shown in the servlet . But i get a blank page. Why?

What have you done to debug this? Is the servlet even being called? Add some logging to the servlet to see if it is, or use the debug console in the browser to observe the behavior of the requests and responses.