Submit a form with a button (HTML)

So I am making a program that would post on a webpage, to submit the form it has to "click" on a button :

< button class="form" type="submit" > Send < /button >

From what I know (not much) to submit a POST request when it's INPUT you must do name=value, but I don't know how I could do that with a submit button.

Basically I wanna know what I must POST to the website so that it submits the form :p

Thank you in advance guys !