custom.js

$('form').on("submit", function(e) {
        $.ajax({
            type: "POST",
            url: $(this).attr('action'),
            data: $(this).serialize(),
            success: function(resp) {
                var obj = $.parseJSON(resp);
                if (obj.resp == 0) {
                    $(this).removeAlertBoxes();
                    $(this).alertBox(obj.err, { type: 'error'});
                } else if (obj.resp == 'redirect') {
                    this[0].reset();
                    window.location = obj.redirect;
                } else if (obj.resp == 'reload') {
                    this[0].reset();
                    window.location.reload();
                }
            }
        });
        return false;
    });