Using highslide with Website Membership Plugin

Hi,

Can someone help me with the closing of popups if the username and password are ok.
I sure hope someone can help me with this.

Normally the highslide popups can be closed in one of the following ways with one of the following codes:

1 ------------------------------------------------------------
With a submit button you can redirect the main page like this:
<input type="submit" name="submit" value="Login" onclick="parent.location.href = 'http://www.highslide.com/'" />
Or do it with a delay like this:
<input type="submit" name="submit" value="Login" onclick="setTimeout(function () {
try {
parent.location.href = 'http://www.highslide.com/';
} catch (e) {}
}, 5000);" />

2 ------------------------------------------------------------
If your submit button belongs to a Login form that will automatically go to another page after you’ve clicked the button, you shouldn’t do any changes to the submit button. Instead you can add this to the confirmation page (the page that opens in the iframe after you’ve clicked the submit button):
<script type='text/javascript'>
setTimeout(function () {
try {
parent.window.hs.getExpander().close();
} catch (e) {}
}, 3000);
</script>
This will close the popup after 3000 ms.

3 ------------------------------------------------------------
If you want to close the popup and redirect the main page, you can use this:
<script type='text/javascript'>
setTimeout(function () {
try {
parent.window.hs.getExpander().close();
parent.location.href = 'http://www.highslide.com/';
} catch (e) {}
}, 3000);
</script>

But the forms of the Website Membership Plugin need to check e few things like: username, password, invalid fields, etc.
And after this it goes to the desired link. If I use this now and I get an error message it still jumps to the link used after the popup is closed!
I want to know how I can do this in the http://www.YourDomain.com/cmsAdmin/plugins/websiteMembership/websiteMembership.php .
I think it's possible in the websiteMembership.php page. Especially in this part of code (I changed the error reports to a different language):

<!-- part of code of the websiteMembership.php page -->

function _websiteLogin_login() {
global $CURRENT_USER;

// set cookies
// header line must be first or other cookies won't be set.
// HttpOnly is only supported in PHP 5.2 so we do this manually
$_SESSION['username'] = @$_REQUEST['username']; //
$_SESSION['passwordHash'] = md5(@$_REQUEST['password']);

// check for valid login
$CURRENT_USER = _websiteLogin_getCurrentUser();
if (alert()) { return; }

// error checking
if ([url "mailto:!@$_REQUEST['username'"]!@$_REQUEST['username'[/url]]) { alert("Por fabor hinka un username!<br/>\n"); }
else if ([url "mailto:!@$_REQUEST['password'"]!@$_REQUEST['password'[/url]]) { alert("Por fabor hinka un password!<br/>\n"); }
else if (!$CURRENT_USER) { alert("Username òf password invalido!<br/>\n"); }
if (function_exists('wsms_login_errorchecking')) { alert(wsms_login_errorchecking($CURRENT_USER)); }
if (alert()) {
$CURRENT_USER = false;
return;
}

// clear form values
$_REQUEST['username'] = '';
$_REQUEST['password'] = '';

// redirect on success
if (@$_SESSION['lastUrl']) { $postLoginUrl = @$_SESSION['lastUrl']; }
else if ($GLOBALS['WEBSITE_LOGIN_POST_LOGIN_URL']) { $postLoginUrl = $GLOBALS['WEBSITE_LOGIN_POST_LOGIN_URL']; }
else { $postLoginUrl = thisPageUrl(); }
$redirectUrl = $GLOBALS['WEBSITE_LOGIN_POST_LOGIN_URL'];

unset($_SESSION['lastUrl']);
redirectBrowserToURL("$postLoginUrl");
exit;

}

<!-- /part of code of the websiteMembership.php page -->

If somebody know the solution, please give me a hand with this.

Regards,

Tim