call a servlet from a JSP! or a servlet from another??

[Rupesh Choubey]

Title: call a servlet from a JSP! or a servlet from another??

Could anyone help with the following issues:

** How do I call a servlet FROM a JSP? something like <! RequestDispatcher.forward ??????????

** How do I call a servlet FROM another servlet? (i know its got to do with the RequestDispatcher...but i couldnt make it work....could someone send me code snippets)

thanks in advance,
rupesh.