how to call logout functionality of one context from another

Explaining Existing environment : there is an application called Global Frame Work, which is running on IIS(dotnet) server and is responsible for login and logout functionality, one more important functionality is menu building based on the logged in user role. Inside the GFW application there many more application linked up using iframe s. these iframes holds another applications which might running on ISS server OR Web sphere application server(java).

So GFW is one context and iframe holded applications in another context.

 

GFW logout functionality is trigging using  onclick javaScritp functionality.

 

Here the problem is, I need to use the logout functionality of GFW application from WAS7 server context which is holding by iframe. If I call the above GFW logout functionality(onclick javaScritp) its not able to call the javascript function and its activity is limited to inside the iframe only.

 

thanks 

Ravi