JQuery: Submit Data to server from different fields not in same form

In jquery, when you want to submit a form

$(document).ready(function(){
    $("form").submit(function(){
        alert("Submitted");
    });
});

My problem is: I have a bunch of fields (that not in same form, or not in any form at all). And when I press send button, jquery will get values of all those fields and send to server (as sending a form).

I don't know how to this in jquery. Please tell me

thanks :)