jQuery ajax form.submit() in .done always triggered

I'm using the following Javascript to check a form before actually submitting.

$('#homesubmit').click(function(e){
    e.preventDefault();
    if (!$("#inputcode").val()) {
        e.preventDefault();
        $("#inputcode").qtip({
            content: 'Please enter code!.',
            style: {
                /* Other qtip settings and stuff */
        })
    }
    else {
        var jqxhr = $.post( "<?php echo base_url().'ajaxhandler?action=checkcodehome'?>", $( "#startcode" ).serialize())
            .done(function() {
                alert( "Correct!");
                /* // If code is correct, please do submit the form...
                $.('#startcode').submit(); */
            })
            .fail(function() {
                alert( "Wrong!");
                /* Maken a qtip tooltip*/
            });
    }
});

Ajaxhandler gives a 200 OK header when the form is ready to be submitted and a 404 when that's not the case. This works wonderful with the alerts that I've got in my example, but when I want to call .submit() on the form on succes the form is submitted on .fail as well.

I guess I could have my ajaxhandler return a json with true/false and check that value in .done, but that seems redundant since there's no data that I want to send.

Why is the alert() triggered that corresponds to the response, but is $.('#startcode').submit() always called?

Kind regards