Session deletion on window close?

Hi there, First off this may be more of a javascript question than PHP question but I was wondering if anyone else has attempted something similar (and it does involve the deletion of PHP sessions). Here's the scenario: I have a 'stand alone' website on our intranet which creates a PHP session upon startup. A new browser window is then opened for the duration of the site - until the user has finished and wishes to leave the system. This window cannot have a link to a standard 'logout' page, it needs to delete the PHP session when the browser window is closed (possibly by launching a temporary page which calls the necessary functions and then automatically closes via javascript). The problem I have is that this site must work in both IE and Netscape and this is what is causing me headaches :) Both browsers supposedly support an 'onunload' event and I have managed to achieve what I want in IE but Netscape refuses to lauch my 'logging out' page. Does anyone have any suggestions as to how I could achieve the following: a) Browser window closed by user clicking on [X] b) 'Logging out' page opened (which handles the PHP session deletion). I hope this is clear enough. Neil -------------------------------- Email: neil.freeman@asa.co.uk neil_freeman@yahoo.com --------------------------------