[jQuery] Problem with jQuery form pluging redirecting

[David]

I use the form plugin
$(document).ready(function() {
    var options = {
        target:        '#divShow',
        beforeSubmit:  showRequest,
        success:       showResponse
    };
    $('#myForm').ajaxForm(options);
});

This works, but in the form php file, I'm trying a redirection but the
page redirected displays in #divShow. How can I do to redirect to the
page not to be displayed in the div?

<?php
header("Location: http://localhost/";);
?>
Thanks