Use of variables in template

[crepo]

In our country there is an "official" statistic platform with all advertising agency's use. Therefore I must add a tag in the footer of or forum. With use a keyword where I need to place the forumID and threadID

I have placed this code in the footer template:

forum id was $GLOBAL[forumid]
<script type="text/javascript" src="/metriweb/mwTag.js"></script>
<script type="text/javascript">
var mw_forumid = "$GLOBAL[forumid]";
var mw_threadid = "$GLOBAL[threadid]";
var mw_postid = "";

var keyword = "";
var extra = "nl"; 
metriwebTag ("sitename", keyword, extra);
</script>

But we get always this information in our output code

forum id was 
<script type="text/javascript" src="/metriweb/mwTag.js"></script> 
<script type="text/javascript"> 
var mw_forumid = "";
var mw_threadid = "";
var mw_postid = "";
 
var keyword = "";
var extra = "nl"; 
metriwebTag ("sitename", keyword, extra);
</script>

Is there a reason why we don't get the information? Do we something wrong?

Thanks for your help,