Pressing A Webpage Button

[Steve M]

Do you actually need to 'press' the button? Or do you just need the
effect that pressing the button would bring about (e.g., submitting a
Google search query and receiving the results page)?

If the latter, then you might want to search for, e.g., "html form get
post" and check out some results. Pushing the button is often just
loading a URL with parameters.

For example, go to Google and type "html form get post" into the search
box and press Submit. Now look at the URL you are visiting in your
location bar, the URL of the search results. It will be something like:

http://www.google.com/search?hl=en&q=html+form+get+post&btnG=Google+Search

If you were to load that URL directly (without having gone to the
Google homepage, typed "html form get post" in the text entry box and
pressed submit) the exact same effect would happen. Filling in the box
and clicking the submit button is just the user-friendly way of
constructing that URL.