Substituting inside script tags?

Hello...

I have a situation with an embedded code to cb content module...

The embedded code is in script tags like this...

<script>
    rtmq(
        'login', {
            hash: '......',
            username: 'username',
            image: 'IMAGE', // [optional]
            ....
        }
    );
</script>

I tried to change the username: 'username' to username: '[username]' to populate the username of the viewing user but it seems it is not working. Is there a case that substitutions do not work inside script tags?
If yes... Is there any way to bypass this?

Than you in advance.
 

They'll work there, but Joomla's WYSWIG editor will probably strip most of that out or re-format it. I'd recommend putting JS in the Javascript parameter of your CB Content Module without <script> tags to directly output custom JS without the WYSWIG editor altering it.