olark.configure('system.google_analytics_id', string );

Notes

Set the Google Analytics ID for your account on a specific page.

For example, you might have separate domains using the same Olark account, but different Google Analytics IDs.

<?php

// Get the current domain
$host = $_SERVER['HTTP_HOST'];

if ($host == "example.com") {
   olark.configure('system.google_analytics_id', 'YOUR-GA-ID' );
}
elseif ($host == "test.org") {
    olark.configure('system.google_analytics_id', 'OTHER-GA-ID' );
}

?>

Check out our related help guide for this here. You can also view advanced troubleshooting help for Google Analytics + Olark here.