submitting multiple forms with AJAX

I have a page which contains several forms. I want to add a single submission button that will allow all the forms to be saved at the same time, as illustrated below:

<form id="form1" name="form1" action="someAction" method="post">
    ....form fields
</form>

<form id="form2" name="form2" action="someOtherAction" method="post">
    ....form fields
</form>

<form id="form2" name="form2" action="anotherAction" method="post">
    ....form fields
</form>

<a href="somewhere.html" onclick="submitAll();">Submit All Forms</a>

<script>
    function submitAll() {
        document.form1.submit();
        document.form2.submit();
        document.form3.submit();
    }
</script>

The issue I'm having is that once the first form gets submitted, it is redirecting the page to that form's destination - I want to intercept that redirect so that I can process the next form.

I know that this can be done via AJAX, which would somehow allow me to catch the returned page (and ignore it if I so choose), but I can't figure out how to do this without mapping each of the fields in the form manually.

Can anyone help?

This should submit each form via ajax without having to map the fields yourself:

$('form').each(function() {
    var that = $(this);
    $.post(that.attr('action'), that.serialize());
});