A better pattern for binding jQuery events to DOM elements. This avoids event mangling.

jquery-events.js

var $events = $('body')
  , submitButton = '.login form .submit'
  ;

function saveForm(ev) {
  var $form = $(this)
    , data
    ;
  
  ev.preventDefault();
  ev.stopPropagation();
  
  if (!ajaxy) {
    $form.submit();
  } else {
    data = $form.serializeArray();
    $.ajax({ body: data });
  } 
}

$events.on('click', submitButton, saveForm);