4. Finally return to the calling page.
I know nothing except the fact of my ignorance. -Socrates
You are describing a JSp as if it's a method that can be called and then return control to the original caller. HTTP doesn't work that way.
JSP is a templating mechanism for creating HTML pages to be sent to the browser. So everywhere you will be using JSP, just think of it as an HTML page and "call" it the same way that you would another HTML page.