function readOnly(count){ }
Starting November 20, the site will be set to read-only. On December 4, 2023,
forum discussions will move to the Trailblazer Community.
+ Start a Discussion
hari azmeera 8hari azmeera 8 

custom logout functionality in vf page

RatanRatan
You cannot do anything after log out .You can write a method and perform all logic and finally return to logout call. 

   
public pagereference logout(){
       //perform Business logic here
        PageReference pageRef = new PageReference('/default/secur/logout.jsp');
        pageRef.setRedirect(true);
        return pageRef;
    }

Source: salesforce apex callback function onclick of logout in force.com site (http://salesforce.stackexchange.com/q/60990/18731)

check this as well: apex method for logout from force.com site (http://salesforce.stackexchange.com/questions/9499/apex-method-for-logout-from-force-com-site)
 
RatanRatan
One more way to handle in VF page it self
 
<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>

use 
window.open('https://login.salesforce.com/secur/logout.jsp', '_blank')

on click of any button.. It will redirect to logout page..