1034: Mainline

The following steps lead to the actuation of a servlet instance from an HTML link.

You click on the link, in which the address tag supplies the location and name of a servlet, as in the following example:
```
You can <a href="//whitney.ai.mit.edu/servlet/startcritic">vote</a> 
on movies yourself, if you wish. 
```
The servlet server looks up the servlet name, startcritic, in a table described in Segment 1037; it finds a class name, GetCriticFormServlet.
Unless a GetCriticFormServlet instance has been constructed already, the servlet server constructs a GetCriticFormServlet instance, and calls the class's init method with the instance as the target.
The servlet server, by convention, calls the GetCriticFormServlet class's doGet method with the instance as the target.
The doGet method prepares HTML-decorated text to be sent back to the browser for display.

Because you are looking at this book using a browser, you can really, really vote on movies yourself, if you wish, given that the targeted servlet server happens to be up and running. By clicking on vote, you activate a servlet that returns an HTML form. Use the back button on your browser to return here.