What exactly represent these parameter of this function associated to a form submit event?

Question

I am pretty new in JavaScript\JQuery and I have the following doubt about this code found in a project on which I am working on.

This project use jQuery Impromptu plugin to show dialogs: http://trentrichardson.com/Impromptu/

So in my JavaScript code I have something like this:

function salvaDatiContabili(ente){
    if($('#gestioneDatiContabiliForm').valid()){
        $.prompt('I dati contabili inseriti possono essere associati a tutti i tuoi progetti per l\'ente '+ente+'. A quali progetti vuoi associare i dati inseriti? ', {
            title: "Richiesta di conferma",
            position: { width: 700 },
            buttons: { "Solo a questo progetto": "progetto", "A tutti i progetti per l\'ente beneficiario": "ente", "Annulla": "annulla" },
            submit: function(e,v,m,f){

                if(v!= 'annulla')
                    alert('chiamata ajax: '+v);
            }
        });
    }
}

The $.prompt() function of this code render a dialog with 3 buttons, respectivelly with the following content text: "Solo a questo progetto" and "A tutti i progetti per l'ente beneficiario" and "Annulla".

My doubt is related on the meaning of the e,v,m,f of the function associated to the submit event by this code:

submit: function(e,v,m,f){
    if(v!= 'annulla')
    alert('chiamata ajax: '+v);
}

I have understant that the v parameter identify the value associated to the action of the clicked button.

But what exactly represent the other 3 values? Are something related only to the jQuery Impromptu plugin or are some generic JQuery or JavaScript stuff?