Login page and Colorbox layer

Hi,

For one of my wordpress based website, I have to display the login page into a Colorbox layer (http://colorpowered.com/colorbox/).

And I’d like to close the window layer once the form has been submitted without error.

I know how to close the layer, but each time the form is submitted, (wrong or right), the window closes before the user is logged…

So, is there a way to determine (in php or javascript/jquery) if the user is logged before the javascript functions close the box?

This is the jquery that I use to close the layer:

<script type="text/javascript">
jQuery(document).ready(function($){
   $('#loginform').submit(function(){
   parent.$.fn.colorbox.close(); // close the colorbox layer
   parent.window.location.reload(); // refresh the page where the layer has been called
   });
});
</script>

Any help would be greatly appreciated!