Logout from Salesforce

TestWindowOpenClose.page

<apex:page >
    <script>
        var win = window.open('https://login.salesforce.com/secur/logout.jsp', '_blank');
        setTimeout(function(){ win.close(); }, 2000);
    </script>
    <h1>Test Open/Close</h1>
</apex:page>

In a Visualforce page for easy testing, but should work from anywhere.

I needed to do this...wasn't working on jQuery mobile framework.

I switched to an apex:iframe with height and width zero that contains that /logout.jsp page. That worked more elegantly, and avoids the issues with mobile framework naviation or popup blockers