Change URL on Logout - cookie clear

[JoshFink]

How would I go about changing the URL when the cookie clears?

I see this code in login.php

I'm assuming that it's the bolded code that is sending the url but how would I change it? Say I wanted to change it to {my site}/josh/index.php instead of the default?

Thanks

if ($_REQUEST['do'] == 'logout')
{
	$vbulletin->input->clean_gpc('r', 'logouthash', TYPE_STR);

	if ($vbulletin->userinfo['userid'] != 0 AND $vbulletin->GPC['logouthash'] != $vbulletin->userinfo['logouthash'])
	{
		eval(standard_error(fetch_error('logout_error', $vbulletin->session->vars['sessionurl'], $vbulletin->userinfo['logouthash'])));
	}

	process_logout();

	$vbulletin->url = fetch_replaced_session_url($vbulletin->url);
	if (strpos($vbulletin->url, 'do=logout') !== false)
	{
		$vbulletin->url = $vbulletin->options['forumhome'] . '.php' . $vbulletin->session->vars['sessionurl_q'];
	}
	$show['member'] = false;
    eval(standard_error(fetch_error('cookieclear', $vbulletin->url, $vbulletin->options['forumhome'], $vbulletin->session->vars['sessionurl_q']), '', false));
}