SCORM 2004 64K character limit but no 6 minute log off feature? How to resolve

We have course requirements (for compliance courses) that the user is logged out after 6 minutes of inactivity. We currently use SCORM 2nd Edition 4K character limit because the 6 minute activity limit log off feature is included. 

We would like to use SCORM 2004 4th edition but it does not have the 6 minute activity limit log off feature.

My question is: Can we use a similar JavaScript as a work around (I found this on another thread):

The log out code is customized; for example I use window.open("logout.html") and create the logout.html file.
setTimeout(function(){ /* your logout code */ }, 1000 * 60 * 6 /* six minutes in milliseconds */);

Or is there another/better workaround?

Note: 1. we use Vector Solutions LMS which works well with Articulate files so far. 2. We create quizzes/exams/surveys within the LMS not Storyline (for reporting).

Thanks for your help on this.

-Debra